Code Quest Game Development and Verification

Let me understand the task:

1. Make a brand new game - something not done before
2. Something useful to the audience
3. Research if needed but don't spend too much time
4. Write a good game that works

The last game was "Dungeon Delver" - a roguelike dungeon crawler. I need to make something different.

Let me first check what games already exist in the arcade to avoid repetition, then come up with a fresh idea.

Let me install the shell tools and check the existing games.

Let me check the existing games in the arcade to understand what's already been done.

Let me analyze the existing games to find a unique game idea:

Existing games:

1. 2048 - sliding number puzzle
2. battleship - naval strategy
3. beat-drop - rhythm game
4. block-cascade - tetris
5. box-pusher - sokoban
6. circuit-breaker - lights out
7. dungeon-delver - roguelike dungeon crawler
8. echo-maze - memory maze
9. gem-cascade - match-3
10. gravity-golf - physics golf
11. gridlock - rush hour sliding block
12. mastermind - code breaking
13. math-blitz - mental math
14. mine-sweeper - minesweeper
15. neon-breakout - breakout
16. neon-flip - reversi/othello
17. neon-flow - flow free
18. orbit-weaver - arcade survival
19. picross-quest - nonogram
20. pixel-painter - pixel art
21. prism - light/mirror puzzle
22. pulse - simon says
23. quantum-circuit - quantum computing
24. realm-guard - tower defense
25. snake - snake
26. sudoku-sage - sudoku
27. tower-of-hanoi - tower of hanoi
28. type-storm - typing game
29. word-forge - wordle
30. word-hunt - word search

So we have 30 games. I need to make something new and different. Let me think about what genres/mechanics haven't been covered:

• No card game (like solitaire, poker, etc.)
• No idle/incremental game
• No simulation game
• No physics-based building game
• No platformer
• No shooter (other than tower defense)
• No racing game
• No pinball
• No billiards/pool
• No chess
• No checkers
• No connect-4
• No hangman
• No trivia/quiz game
• No color-mixing game
• No music creation game
• No farming/garden game
• No city builder
• No reaction time game
• No sliding puzzle (15-puzzle)
• No jigsaw puzzle
• No memory card matching game (concentration)
• No bowling
• No golf (well, gravity golf exists)
• No darts
• No plinko
• No slot machine / casino
• No stock market / trading game
• No tamagotchi / virtual pet
• No escape room
• No hidden object game
• No spot the difference
• No tangram
• No dominoes
• No backgammon
• No mahjong
• No bingo
• No Yahtzee / dice game
• No Conway's Game of Life
• No cellular automaton
• No reaction/reflex game
• No color theory game
• No constellation/star connecting game
• No music sequencer
• No drum machine
• No paint mixing game
• No bridge building game
• No marble run / marble drop
• No pachinko
• No air hockey
• No pong
• No asteroids clone
• No space invaders clone
• No pac-man clone
• No frogger clone
• No lunar lander
• No text adventure
• No choose-your-own-adventure
• No dating sim
• No visual novel
• No farming sim
• No fishing game
• No cooking game
• No restaurant management
• No airport management
• No traffic control game
• No factory/production line game
• No logistics game
• No programming/coding game (like Zachtronics)
• No hacking game
• No chemistry game
• No biology game
• No geography game
• No astronomy game
• No language learning game
• No music theory game
• No art history game
• No history game
• No economics game
• No political game
• No social game

Let me think about what would be:

1. Unique and not done before
2. Useful to the audience
3. Fun and engaging
4. Feasible to implement well in a single HTML file

I think a color theory / color mixing puzzle game would be really interesting and educational. Or a chemistry/molecule building game. Or a constellation connecting game. Or a music sequencer/beat maker. Or a programming puzzle game (like a simplified Zachtronics or Human Resource Machine).

Actually, let me think about what would be most "useful to the audience" and also fun:

1. A programming/coding puzzle game - teaches logic and programming concepts. Very useful and educational. Like a simplified version of "Human Resource Machine" or "7 Billion Humans" where you program a worker to solve tasks using simple instructions.

2. A color theory puzzle game - teaches color mixing (additive/subtractive), complementary colors, etc. Educational and visually appealing.

3. A music sequencer/beat maker - creative and educational about music theory.

4. A chemistry molecule builder - educational about molecular bonds.

5. A constellation/star map game - educational about astronomy.

6. A reaction time / reflex training game - useful for cognitive training.

7. A stock market / trading simulator - educational about economics.

8. A factory/production line optimization game - teaches logistics and optimization.

I think a programming puzzle game would be the most unique and useful. It's a genre not yet covered, it's educational, and it can be really engaging. Let me design one.

Actually, let me think more carefully. A programming puzzle game where you drag-and-drop instructions to control a robot/worker through levels. This is like "Lightbot" or "Human Resource Machine."

Let me design this:

Game Name: "Code Quest" or "Bot Builder" or "Logic Lab"

Concept: You control a robot on a grid. You need to program it to reach goals, collect items, and avoid obstacles. You use a visual block-based programming interface where you drag instructions into a sequence:

• Move Forward
• Turn Left
• Turn Right
• Jump
• Pick Up
• Drop
• Repeat N times (loops)
• If (condition) then (conditionals)

The game would have multiple levels with increasing complexity, teaching programming concepts like:

• Sequencing
• Loops
• Conditionals
• Functions/procedures

This is educational, unique, and fun. Let me build it.

Actually, let me think about the visual style. The existing games use a lot of neon themes. I should do something different. Let me go with a clean, modern, "tech lab" aesthetic with a warm color palette - maybe orange/amber and teal accents on a dark background. Or maybe a "retro computer terminal" aesthetic with green-on-black.

Let me go with a "robotics lab" theme - clean, modern, with a warm orange/amber primary color and teal secondary, on a dark slate background. This will be visually distinct from the neon games.

Let me plan the game architecture:

1. Grid-based level system - Each level has a grid with:

   • Robot start position and direction
   • Goal tiles
   • Obstacles (walls)
   • Collectible items
   • Buttons/switches
   • Doors

2. Programming interface - A sidebar where you drag blocks to create a program:

   • Movement blocks: Forward, Turn Left, Turn Right
   • Action blocks: Pick Up, Drop, Interact
   • Control blocks: Repeat (with counter), If (with conditions)
   • The program runs step by step with visual feedback

3. Execution engine - Runs the program step by step, animating the robot's movements

4. Level progression - 12+ levels with increasing complexity

5. Features:

   • Step-by-step execution with speed control
   • Reset button
   • Level select
   • Star ratings based on efficiency (fewer blocks used)
   • Persistent progress
   • Sound effects
   • Keyboard + touch support

Let me think about the implementation more carefully. This is a complex game. Let me design the levels:

Level 1: Move forward 3 times to reach the goal (teaches sequencing) Level 2: Turn and move to reach goal (teaches turning) Level 3: Collect items then reach goal (teaches pick up) Level 4: Use a repeat loop to move forward 5 times (teaches loops) Level 5: Navigate around obstacles (teaches planning) Level 6: Use conditional - if wall ahead, turn (teaches conditionals) Level 7-12: More complex puzzles combining all concepts

Actually, for a single HTML file, I need to be careful about complexity. Let me simplify the block system:

Blocks:

• ⬆️ Forward (move one cell in facing direction)
• ↪️ Turn Right (rotate 90° clockwise)
• ↩️ Turn Left (rotate 90° counter-clockwise)
• 🔁 Repeat (loop body N times)
• ❓ If Wall (execute body if wall/obstacle ahead)
• 🎯 If Goal (execute body if on goal)
• 💎 If Gem (execute body if on gem)
• ⏹️ End (end program)

Actually, let me simplify even further. Let me use a simpler instruction set:

Instructions:

• MOVE (forward)
• TURN LEFT
• TURN RIGHT
• REPEAT n { ... } (loop)
• IF WALL { ... } (conditional)
• IF GEM { ... } (conditional)

The player drags these into a program list. For REPEAT and IF, they can nest blocks inside.

Hmm, nesting makes the UI complex. Let me think about a simpler approach.

Alternative: Use a flat instruction list with a "REPEAT n" that repeats the next k instructions. But that's less intuitive.

Actually, let me use a different approach. Instead of drag-and-drop blocks (which is complex to implement well), let me use a command card system where you select commands from a palette and they get added to your program sequence. For loops, you use "REPEAT START n" and "REPEAT END" markers. For conditionals, "IF START condition" and "IF END" markers.

This is simpler to implement and still teaches the concepts.

Let me design the UI:

Actually, I think I should make this more visual and polished. Let me think about the rendering approach.

I'll use HTML5 Canvas for the game grid (rendering the robot, tiles, gems, goals, walls) and DOM elements for the programming interface (command palette, program list, controls).

Let me think about the visual style:

• "Robotics lab" theme
• Dark slate background (#1a1a2e or similar)
• Warm amber/orange accents (#f59e0b)
• Teal secondary (#14b8a6)
• Clean, modern typography
• Grid cells with subtle borders
• Robot as a cute character (drawn with canvas shapes)
• Smooth animations for robot movement

Let me now plan the full implementation:

Game Architecture

Level Design

Each level is defined as:

Let me design 12 levels:

1. "First Steps" - Move forward 3 to reach goal
2. "Turn Around" - Turn and move to reach goal
3. "Gem Collector" - Collect a gem then reach goal
4. "Loop Lesson" - Use a repeat loop to move forward 5 times
5. "Maze Runner" - Navigate a simple maze
6. "Double Gems" - Collect 2 gems and reach goal
7. "Loop de Loop" - Use nested loops
8. "Conditional Path" - Use IF WALL to navigate
9. "Smart Collector" - Use IF GEM to collect gems conditionally
10. "Complex Maze" - Combine loops and conditionals
11. "Efficiency Challenge" - Solve with minimal blocks
12. "Master Programmer" - Final challenge combining everything

Actually, let me think about the loop implementation more carefully. With a flat list approach:

Program: [MOVE, REPEAT_START(3), MOVE, TURN_RIGHT, REPEAT_END, MOVE]

When executing:

1. MOVE - execute
2. REPEAT_START(3) - push loop context (repeat count=3, return index=2)
3. MOVE - execute
4. TURN_RIGHT - execute
5. REPEAT_END - decrement counter, if >0 jump back to after REPEAT_START, else pop context
6. MOVE - execute

This works! Let me implement this.

For conditionals: Program: [IF_START(WALL), TURN_RIGHT, IF_END, MOVE]

When executing:

1. IF_START(WALL) - check if wall ahead, if true push if context (active=true), else push if context (active=false, skip to IF_END)
2. TURN_RIGHT - execute only if if context is active
3. IF_END - pop if context
4. MOVE - execute

This also works!

Let me now think about the full implementation. This is going to be a large file. Let me structure it well.

Actually, I realize I should also think about what makes this game "useful to the audience." A programming puzzle game teaches:

• Sequential thinking
• Loops and iteration
• Conditional logic
• Problem decomposition
• Debugging (when the program doesn't work, you adjust it)
• Efficiency optimization (fewer blocks = more stars)

This is genuinely educational and useful for anyone interested in learning programming concepts.

Let me now write the code. I'll create a comprehensive, polished game.

Let me think about the visual design more:

Color palette:

• Background: #0f172a (dark slate)
• Surface: #1e293b
• Surface light: #334155
• Primary accent: #f59e0b (amber)
• Secondary accent: #14b8a6 (teal)
• Success: #22c55e (green)
• Danger: #ef4444 (red)
• Text: #f1f5f9
• Muted: #94a3b8

Robot design: A cute robot drawn with canvas - rounded rectangle body, antenna, eyes, directional indicator. Colors: amber body with teal accents.

Grid tiles:

• Empty: dark with subtle border
• Wall: solid block with texture
• Goal: glowing teal circle/star
• Gem: amber diamond shape
• Button: circular button
• Door: rectangular door

Let me start coding. I'll write the complete HTML file.

Actually, let me reconsider the approach. Instead of a flat list with REPEAT_START/END, let me use a more visual approach where blocks are shown as cards in a vertical list, and loops/conditionals are shown as indented blocks. This is more intuitive and closer to real visual programming.

But implementing nested drag-and-drop is complex. Let me use a simpler approach:

The program is a flat list of command cards. Each card has:

• type: 'move', 'turn-left', 'turn-right', 'pickup', 'loop-start', 'loop-end', 'if-start', 'if-end'
• value: for loop-start, the repeat count; for if-start, the condition

The UI shows them as a vertical list. Loop-start and if-start cards show their nested blocks indented. The player adds commands by clicking buttons in the command palette.

For the visual nesting, I can calculate the indentation level by tracking the nesting depth as I iterate through the program.

Let me implement this. Here's my plan:

1. Command palette at the bottom with buttons for each command type
2. Program list in the middle showing the sequence of commands
3. Game grid on the left showing the current state
4. Run/Stop/Reset controls
5. Level info and navigation

When the player clicks a command button, it gets appended to the program. They can also remove commands by clicking on them (or with a delete button on each card).

For loops: Click "Loop" button → adds a LOOP_START card with a default count of 2, then the player adds commands, then clicks "End Loop" to add LOOP_END. The loop count can be adjusted with +/- buttons on the LOOP_START card.

For conditionals: Click "If Wall" button → adds IF_START card, then commands, then "End If" to add IF_END.

Let me code this now. I'll write a comprehensive, well-structured game.

Let me think about the levels more carefully. I need to make sure each level is solvable and teaches a concept.

Level 1: "First Steps"

Robot faces right. Just MOVE FORWARD 3 times. Par: 3 blocks

Level 2: "Corner Turn"

Robot faces right. MOVE, MOVE, TURN RIGHT, MOVE, MOVE, TURN LEFT, MOVE, MOVE Wait, that doesn't work with the grid. Let me redesign.

Actually, let me use a simpler grid format. Let me use a 2D array where each cell is a character:

R at (2,1), G at (2,6). Robot faces right. MOVE x5.

Wait, I need to be more careful with coordinates. Let me use (row, col) format.

Level 1: "First Steps"

R at row 2, col 0. G at row 2, col 7. Robot faces right. Solution: MOVE x7. Par: 7 blocks. But that's a lot. Let me make the grid smaller.

R at (2,0), G at (2,3). MOVE x3. Par: 3.

Level 2: "Turn Right"

R at (1,0) facing right. Need to go right 3, then down 2. MOVE, MOVE, MOVE, TURN RIGHT, MOVE, MOVE. Par: 6.

Wait, "down" means the robot needs to face down. If it starts facing right and turns right, it faces down. Then MOVE moves it down. So: MOVE (to col 1), MOVE (to col 2), MOVE (to col 3), TURN RIGHT (now facing down), MOVE (to row 2), MOVE (to row 3). R at (1,0) → (1,1) → (1,2) → (1,3) → turn right → (2,3) → (3,3). G at (3,3). ✓

Level 3: "Gem Rush"

R at (1,0) facing right. Gem at (1,2). G at (3,3). MOVE, MOVE, PICK UP, MOVE, TURN RIGHT, MOVE, MOVE. Par: 7.

Level 4: "Loop Lesson"

R at (2,0) facing right. G at (2,5). Without loop: MOVE x5. 5 blocks. With loop: LOOP_START(5), MOVE, LOOP_END. 3 blocks. Par: 3 (teaches loops).

Level 5: "Maze Runner"

Hmm, let me design this more carefully. Let me use a 7x5 grid.

Actually, let me simplify and use consistent grid sizes. Let me use 7 columns x 5 rows for most levels.

Level 5: "Maze Runner"

Hmm, this is getting complicated. Let me just design simpler mazes.

Level 5: "Obstacle Course"

R at (1,0) facing right. Wall at (1,2). G at (1,5). Path: MOVE, TURN RIGHT, MOVE, TURN LEFT, MOVE, MOVE, MOVE, MOVE. Wait: R at (1,0) → MOVE to (1,1) → wall at (1,2) → TURN RIGHT (face down) → MOVE to (2,1) → TURN LEFT (face right) → MOVE to (2,2) → wall at (2,3)? No, wall is at (2,4) in my grid. Let me re-check.

Actually, let me be more careful:

Row 1: R . # . . G . Row 2: . . . # . . .

R at (1,0). Wall at (1,2). Wall at (2,3). G at (1,5).

Path:

• Start at (1,0), facing right
• MOVE → (1,1)
• Wall ahead at (1,2), need to go around
• TURN RIGHT → facing down
• MOVE → (2,1)
• TURN LEFT → facing right
• MOVE → (2,2)
• Wall ahead at (2,3), need to go around
• TURN RIGHT → facing down
• MOVE → (3,2)
• TURN LEFT → facing right
• MOVE → (3,3)
• MOVE → (3,4)
• MOVE → (3,5)
• TURN LEFT → facing up
• MOVE → (2,5)
• MOVE → (1,5) → G!

That's 14 moves. That's a lot. Let me simplify.

Let me redesign:

Actually, let me make the path simpler:

R at (1,0). Wall at (1,3). Wall at (2,3). G at (1,6).

Path:

• (1,0) facing right
• MOVE → (1,1)
• MOVE → (1,2)
• Wall at (1,3) → TURN RIGHT (down) → MOVE → (2,2)
• TURN LEFT (right) → MOVE → (2,3)? No, wall at (2,3).

Hmm, let me just make a simple maze:

This is getting too complicated. Let me simplify my level designs and just make them work.

Let me take a different approach. I'll define levels programmatically with clear paths.

Actually, let me just code the game and define levels as I go. I'll make sure each level is solvable by testing it.

Let me start writing the code now. This is going to be a big file.

Let me think about the structure:

Let me write the full game now. I'll be comprehensive and make it polished.

Key features to implement:

1. Canvas-based grid rendering with smooth animations
2. Block-based programming interface
3. Step-by-step program execution
4. 12 levels with increasing complexity
5. Loops and conditionals
6. Star ratings based on block efficiency
7. Level select screen
8. Persistent progress (localStorage)
9. Sound effects (Web Audio API)
10. Keyboard + touch support
11. Responsive design

Let me write this now. I'll create the file in one go.

Actually, this is going to be very long. Let me write it in parts and assemble it.

Let me think about the execution model more carefully:

The program is an array of instruction objects:

Execution uses a stack for control flow:

This looks good. Let me also think about the animation system. When the robot moves, I want to animate it smoothly from one cell to the next. I'll use requestAnimationFrame and interpolate the robot's position.

Let me also think about the visual representation of the program. I'll show each instruction as a card in a vertical list. Loop and if blocks will be visually nested with indentation and colored borders.

To calculate nesting depth, I iterate through the program and track depth:

OK, let me now write the complete game. I'll aim for a polished, comprehensive implementation.

Let me think about the levels one more time. I want 12 levels:

1. "First Steps" - Move forward to goal (sequencing) Grid 5x5:

R at (2,0) facing right, G at (2,3). MOVE x3.

2. "Right Turn" - Turn and move (direction changes) Grid 5x5:

R at (1,0) facing right, G at (3,3). MOVE x3, TURN RIGHT, MOVE x2. 6 blocks.

3. "Gem Rush" - Collect gem then reach goal Grid 5x5:

R at (1,0) facing right, Gem at (1,2), G at (3,3). MOVE, MOVE, PICKUP, MOVE, TURN RIGHT, MOVE, MOVE. 7 blocks.

4. "Loop Lesson" - Use a loop to move forward many times Grid 7x5:

R at (2,0) facing right, G at (2,5). Without loop: MOVE x5 (5 blocks) With loop: LOOP(5), MOVE, END (3 blocks) Par: 3.

5. "Spiral Path" - Navigate turns using a loop Grid 7x5:

R at (1,0) facing right, G at (3,5). MOVE x5, TURN RIGHT, MOVE x2. 8 blocks without loop. Or: LOOP(5), MOVE, END, TURN RIGHT, LOOP(2), MOVE, END. 7 blocks. Par: 7.

Hmm, that doesn't really teach loops well. Let me redesign.

5. "Square Loop" - Use loops to trace a square path Grid 7x7:

Hmm, this doesn't work well either. Let me think of a level where loops are clearly beneficial.

5. "Long Hallway" - A long straight path where loops save blocks Grid 9x3:

R at (1,0) facing right, G at (1,8). Without loop: MOVE x8 (8 blocks) With loop: LOOP(8), MOVE, END (3 blocks) Par: 3.

6. "Zigzag" - Use loops for repeated patterns Grid 7x5:

Hmm, this doesn't work. Let me think differently.

6. "Staircase" - Repeated turn-move pattern Grid 7x5:

This is getting complicated. Let me simplify.

Actually, let me just design levels that are fun and solvable, and make sure loops and conditionals are useful in some of them. I don't need every level to perfectly teach one concept.

Let me redesign all 12 levels:

Level 1: "First Steps" (5x5)

R(2,0)→right, G(2,3). Solution: MOVE x3. Par: 3.

Level 2: "Turn Right" (5x5)

R(1,0)→right, G(3,3). Solution: MOVE x3, TURN RIGHT, MOVE x2. Par: 6.

Level 3: "Gem Collector" (5x5)

R(1,0)→right, *(1,2), G(3,2). Solution: MOVE, MOVE, PICKUP, MOVE, TURN RIGHT, MOVE, MOVE. Par: 7.

Level 4: "The Long Walk" (9x3)

R(1,0)→right, G(1,8). Solution: LOOP(8), MOVE, END. Par: 3.

Level 5: "Around the Wall" (7x5)

R(1,0)→right, wall(1,2), G(1,5). Solution: MOVE, TURN RIGHT, MOVE, TURN LEFT, MOVE, MOVE, MOVE. Par: 7.

Level 6: "Double Gems" (7x5)

R(1,0)→right, *(1,2), *(1,5), G(1,6). Solution: MOVE, MOVE, PICKUP, MOVE, MOVE, MOVE, PICKUP, MOVE. Par: 8. Or with loop: LOOP(2), MOVE, MOVE, PICKUP, END, MOVE. Par: 6.

Level 7: "Loop Maze" (7x7)

R(1,0)→right, G(5,6). Solution: LOOP(6), MOVE, END, TURN RIGHT, LOOP(4), MOVE, END. Par: 7.

Level 8: "Conditional Corner" (7x5) - Introduces IF WALL

R(1,0)→right, G(1,5). Walls at (2,1),(2,2),(2,3). Actually, the walls don't block the direct path here. Let me redesign.

R(1,0)→right, walls at (1,2),(1,3), G(1,5). Direct path blocked. Must go around. Solution: MOVE, TURN RIGHT, MOVE, TURN LEFT, MOVE, MOVE, TURN LEFT, MOVE, TURN RIGHT, MOVE. Par: 10. With IF: IF WALL, TURN RIGHT, MOVE, TURN LEFT, END, MOVE... hmm, this is tricky.

Actually, for IF WALL to be useful, I need a level where the robot doesn't know exactly when it'll hit a wall, or where the same conditional logic can be reused. Let me think of a maze where IF WALL is genuinely useful.

A good use case: a maze where the robot follows the right wall (wall follower algorithm). But that's complex.

Simpler use case: The robot needs to move forward until it hits a wall, then turn. Without knowing the exact distance, IF WALL is useful.

But in our game, the player can see the entire grid, so they know the exact distance. The IF is more about teaching the concept than being necessary.

Let me just include IF as a tool and design levels where it can be used, even if it's not strictly necessary.

Level 8: "If Wall" (7x5)

R(1,0)→right, wall(1,4), wall(2,3), G(1,6). Path: MOVE x4, hit wall, TURN RIGHT, MOVE, TURN LEFT, MOVE, MOVE. Or: LOOP(4), MOVE, END, TURN RIGHT, MOVE, TURN LEFT, MOVE, MOVE. Or with IF: MOVE, IF WALL, TURN RIGHT, MOVE, TURN LEFT, END, MOVE, MOVE, MOVE, MOVE, MOVE, IF WALL, TURN RIGHT, MOVE, TURN LEFT, END, MOVE, MOVE.

Hmm, the IF approach is actually longer here. Let me think of a better use case.

Actually, for a programming puzzle game, the IF is useful when you have a loop and don't know exactly when the condition will be true. For example:

This would move forward, turning right whenever hitting a wall, for up to 10 iterations. This is a wall-following approach.

Let me design a level where this is the optimal solution:

Level 8: "Wall Follower" (7x7)

Hmm, this is getting really complex. Let me simplify.

Actually, let me just make the IF WALL condition useful in a simpler way. Consider a level where the robot needs to navigate a corridor with an unknown turn:

Level 8: "Smart Navigator" (7x5)

R(1,0)→right. The robot needs to go right, then down, then left to reach G. But the path is complex. Let me just make a simpler level.

You know what, let me not overthink the level design. Let me create levels that are solvable and fun, and include IF as an available tool. Some levels will be easier with IF, some won't need it. The key is that the game teaches programming concepts through play.

Let me finalize my 12 levels:

1. "First Steps" - Simple move to goal
2. "Turn Right" - Turn and move
3. "Gem Collector" - Pick up gem, reach goal
4. "The Long Walk" - Long straight path (loop introduction)
5. "Around the Wall" - Navigate around obstacle
6. "Double Gems" - Collect multiple gems
7. "Loop Maze" - Use loops for efficient navigation
8. "Conditional Path" - Use IF to navigate
9. "Gem Loop" - Use loop to collect gems efficiently
10. "Complex Maze" - Combine all concepts
11. "Efficiency Run" - Optimize for fewer blocks
12. "Master Coder" - Final challenge

Let me now just write the code. I'll define the levels in the code and make sure they work.

Let me think about the grid rendering. I'll use canvas with a cell size of about 60px. The grid will be centered in the game area.

For the robot, I'll draw a cute robot character:

• Rounded rectangle body in amber
• Two eyes (teal circles)
• An antenna with a small circle on top
• A directional arrow/indicator showing which way it's facing
• Smooth animation when moving and turning

For tiles:

• Empty: dark cell with subtle border
• Wall: solid block with a slightly different color and texture
• Goal: glowing teal star/circle with pulsing animation
• Gem: amber diamond with sparkle effect
• Button: circular button (if I include this)
• Door: rectangular door (if I include this)

Actually, let me keep it simple and not include buttons/doors for now. Just walls, gems, and goals.

Let me now write the complete code. I'll aim for around 1500-2000 lines of well-structured code.

Let me start writing:

OK, let me now write the full implementation. I'll be thorough and make it polished.

Let me think about the CSS design:

• Dark theme with amber/teal accents
• Clean, modern look
• Responsive layout (game area on left, program panel on right for desktop; stacked for mobile)
• Smooth transitions and animations
• Card-based command blocks with color coding

Color coding for commands:

• Move: blue/teal
• Turn: purple
• Pickup: amber
• Loop: green
• If: orange

Let me write the code now. I'll create the file directly.

Actually, I realize I should think about one more thing: the execution animation. When the program runs, I want to:

1. Highlight the current instruction in the program list
2. Animate the robot on the canvas
3. Play sound effects
4. Show step-by-step execution with adjustable speed

The execution loop:

The execution delay can be adjusted with a speed slider.

For the robot animation, I'll use a separate animation system:

OK, I think I have a good plan. Let me write the complete game now.

One more thing: I need to handle the case where the robot tries to move into a wall or off the grid. In that case, the program should stop with an error message.

Also, I need to handle the case where the program ends but the robot hasn't reached the goal or collected all required gems. In that case, show a "try again" message.

Let me also think about the "pickup" action. When the robot is on a gem tile and executes PICKUP, the gem is collected. If there's no gem, nothing happens (or maybe an error?).

For the win condition: the robot must be on the goal tile AND all gems must be collected (if the level has gems).

Let me now write the code. I'll create it as a single file.

Let me also think about what happens when the player makes an error:

• Robot moves into wall: "Crash! Robot hit a wall." → Reset
• Robot moves off grid: "Crash! Robot went off the grid." → Reset
• Program ends without reaching goal: "Program finished, but the goal wasn't reached." → Reset
• Program ends with gems not collected: "Program finished, but not all gems were collected." → Reset

For the star rating:

• 3 stars: program uses ≤ parBlocks blocks
• 2 stars: program uses ≤ parBlocks * 1.5 blocks
• 1 star: program uses more than parBlocks * 1.5 blocks (but still solves the level)

Let me now write the complete code. I'll be comprehensive.

Actually, let me reconsider the level design one more time. I want to make sure the levels are well-designed and solvable. Let me define them clearly:

Level 1: "First Steps" Grid: 5x5

R at (2,0) facing right, G at (2,3) Solution: MOVE, MOVE, MOVE (3 blocks) Par: 3, teaches: sequencing

Level 2: "Right Turn" Grid: 5x5

R at (1,0) facing right, G at (3,3) Solution: MOVE, MOVE, MOVE, TURN_RIGHT, MOVE, MOVE (6 blocks) Par: 6, teaches: turning

Level 3: "Gem Collector" Grid: 5x5

R at (1,0) facing right, Gem at (1,2), G at (3,2) Solution: MOVE, MOVE, PICKUP, MOVE, TURN_RIGHT, MOVE, MOVE (7 blocks) Par: 7, teaches: pickup action

Level 4: "The Long Walk" Grid: 9x3

R at (1,0) facing right, G at (1,8) Solution without loop: MOVE x8 (8 blocks) Solution with loop: LOOP(8), MOVE, END (3 blocks) Par: 3, teaches: loops

Level 5: "Around the Wall" Grid: 7x5

R at (1,0) facing right, Wall at (1,2), G at (1,5) Solution: MOVE, TURN_RIGHT, MOVE, TURN_LEFT, MOVE, MOVE, MOVE (7 blocks) Par: 7, teaches: obstacle navigation

Level 6: "Double Gems" Grid: 7x3

R at (1,0) facing right, Gems at (1,2) and (1,5), G at (1,6) Solution: MOVE, MOVE, PICKUP, MOVE, MOVE, MOVE, PICKUP, MOVE (8 blocks) With loop: LOOP(2), MOVE, MOVE, PICKUP, END, MOVE (6 blocks) Par: 6, teaches: loops with actions

Level 7: "Loop Maze" Grid: 7x7

R at (1,0) facing right, G at (5,6) Solution: LOOP(6), MOVE, END, TURN_RIGHT, LOOP(4), MOVE, END (7 blocks) Par: 7, teaches: multiple loops

Level 8: "Conditional Path" Grid: 7x5

R at (1,0) facing right, Wall at (1,4), Wall at (2,4), G at (1,6) Hmm, the walls don't really block the path to G. Let me redesign.

R at (1,0) facing right, Walls at (1,2),(1,3), G at (1,5) Direct path blocked. Must go around. Solution: MOVE, TURN_RIGHT, MOVE, TURN_LEFT, MOVE, MOVE, TURN_LEFT, MOVE, TURN_RIGHT, MOVE (10 blocks) With IF: This is hard to make shorter with IF. Let me think...

Actually, for IF to be useful, I need a scenario where the robot doesn't know exactly when it'll encounter a wall. But since the player can see the grid, they always know. So IF is more of a "nice to have" tool.

Let me redesign level 8 to make IF more useful:

Level 8: "Wall Follower" Grid: 7x5

Hmm, this is a room with an entrance. The robot needs to find its way in.

Actually, let me make a simpler level where IF WALL is clearly useful:

Level 8: "Maze Runner" Grid: 7x7

This is getting too complex. Let me just make a level where IF can be used but isn't required, and move on.

Level 8: "Smart Turn" Grid: 7x5

R at (1,0) facing right, Walls at (1,5),(2,5),(3,4), G at (4,2) Path: MOVE x5, hit wall at (1,5)... wait, (1,5) is '#'. So MOVE x5 would crash. MOVE x4 (to (1,4)), TURN_RIGHT (down), MOVE (to (2,4)), TURN_LEFT (right), MOVE... (2,5) is '#'. Crash. Hmm, let me redesign.

R at (1,0) facing right, Wall at (1,5), G at (3,2) Path: MOVE x4, TURN_RIGHT, MOVE x2, TURN_LEFT, MOVE... wait, that goes to (3,4) not (3,2). Let me recalculate: R(1,0)→right. MOVE→(1,1), MOVE→(1,2), MOVE→(1,3), MOVE→(1,4), wall at (1,5). TURN_RIGHT→down. MOVE→(2,4). TURN_LEFT→right. MOVE→(2,5)? No wall there. Hmm, I only put wall at (1,5).

Let me just make a clean level:

Level 8: "The Detour" Grid: 7x5

R at (1,0) facing right, Walls at (1,2),(1,3),(1,4), G at (1,6) Path: MOVE (to (1,1)), wall ahead. TURN_RIGHT (down), MOVE (to (2,1)), TURN_LEFT (right), MOVE (to (2,2)), MOVE (to (2,3)), MOVE (to (2,4)), MOVE (to (2,5)), MOVE (to (2,6)), TURN_LEFT (up), MOVE (to (1,6)) = G! That's 10 blocks. With IF: MOVE, IF WALL, TURN_RIGHT, MOVE, TURN_LEFT, END, MOVE x5, TURN_LEFT, MOVE. That's still 10+ blocks.

OK, IF doesn't really help here. Let me just include IF as a tool and not force its use. The player can use it if they want.

Actually, let me think of a level where IF is genuinely useful. The key insight is that IF is useful inside a LOOP when you don't know exactly which iteration the condition will be true.

Example: A corridor of unknown length. The robot moves forward in a loop, and when it hits a wall, it turns.

Level 8: "Endless Corridor" Grid: 7x5

Hmm, this doesn't work well either.

Let me try a different approach. A level with a zigzag path where IF WALL inside a loop is the optimal solution:

Level 8: "Zigzag" Grid: 7x7

This is too complex. Let me simplify.

OK, I'm going to stop overthinking this. Let me just create the levels and make sure they're solvable. IF will be available as a tool, and some levels will be easier with it. The key is that the game is fun and educational.

Let me finalize my 12 levels and just code them:

1. "First Steps" - MOVE to goal
2. "Right Turn" - TURN and MOVE
3. "Gem Collector" - PICKUP gem, reach goal
4. "The Long Walk" - LOOP to move far
5. "Around the Wall" - Navigate obstacle
6. "Double Gems" - LOOP with PICKUP
7. "Loop Maze" - Multiple LOOPs
8. "The Detour" - Navigate around walls
9. "Gem Spiral" - Collect gems in a pattern using loops
10. "Maze Challenge" - Complex maze
11. "Efficiency Run" - Optimize block count
12. "Master Coder" - Final challenge

Let me now write the code. I'll define the levels in the code and test them.

Actually, I just realized I should also think about what happens with the IF condition more carefully. The conditions I'll support:

• IF WALL: True if there's a wall or grid boundary directly ahead of the robot
• IF GEM: True if there's a gem on the robot's current tile
• IF GOAL: True if the robot is on the goal tile

These are simple and useful conditions.

Let me also think about the "interact" action. Instead of just "pickup", maybe I should have:

• PICKUP: Collect a gem on the current tile
• That's it for now. Keep it simple.

OK, let me now write the complete game. I'll create it as a single HTML file.

Let me think about the overall layout one more time:

Desktop layout:

Mobile layout:

OK, let me now write the code. I'll create the complete file.

Let me think about the command types and their properties:

For the command palette, I'll have buttons:

• "Move" → adds MOVE
• "Turn Left" → adds TURN_LEFT
• "Turn Right" → adds TURN_RIGHT
• "Pick Up" → adds PICKUP
• "Loop" → adds LOOP_START (with count=2) and LOOP_END
• "If Wall" → adds IF_START (condition='wall') and IF_END
• "If Gem" → adds IF_START (condition='gem') and IF_END
• "If Goal" → adds IF_START (condition='goal') and IF_END

When "Loop" is clicked, it adds both LOOP_START and LOOP_END, and the player can insert commands between them. The loop count can be adjusted with +/- buttons on the LOOP_START card.

When "If" is clicked, it adds both IF_START and IF_END, and the player can insert commands between them.

For removing commands, each card has a small × button. When you remove a LOOP_START or IF_START, the corresponding END is also removed. When you remove a LOOP_END or IF_END, the corresponding START is also removed.

Actually, this is getting complex. Let me simplify: each card has a × button. When you click it, only that card is removed. The player is responsible for keeping the program valid. If the program has unmatched starts/ends, the execution engine handles it gracefully (treats unmatched END as no-op, unmatched START as executing once).

Actually, for a better UX, let me make the "Loop" button add a LOOP_START and LOOP_END pair together, and the player inserts commands between them by selecting the position. But position selection is complex.

Simpler approach: Commands are always appended to the end of the program. The player builds the program in order. If they make a mistake, they can clear the whole program and start over, or delete individual commands.

Even simpler: The player clicks commands in the order they want them. The program is built sequentially. For a loop, they click "Loop Start", then the commands inside the loop, then "Loop End". For an if, they click "If Wall", then the commands inside, then "End If".

This is the simplest approach and works well. Let me go with this.

The command palette will have these buttons:

1. ⬆️ Move Forward
2. ↪️ Turn Right
3. ↩️ Turn Left
4. 💎 Pick Up
5. 🔁 Loop Start (with adjustable count)
6. 🔚 Loop End
7. ❓ If Wall
8. ❓ If Gem
9. ❓ If Goal
10. 🔚 End If

Actually, that's a lot of buttons. Let me group them:

Movement: [Move] [Turn Left] [Turn Right] Action: [Pick Up] Loop: [Loop Start] [Loop End] Condition: [If Wall] [If Gem] [If Goal] [End If]

For the Loop Start, I'll add it with a default count of 2, and the player can adjust the count by clicking +/- on the card in the program list.

OK, let me now write the code. I'll create the complete file.

Let me also think about the level complete screen. When the robot reaches the goal (and all gems are collected), show a modal with:

• "Level Complete!" message
• Star rating (1-3 stars based on block count)
• Block count vs par
• Buttons: "Next Level", "Replay", "Level Select"

And if the program fails (crash into wall, off grid, or program ends without reaching goal):

• Show an error message
• "Try Again" button (resets the robot but keeps the program)

Let me now write the complete code. I'll aim for a polished, comprehensive implementation.

Let me also think about the sound effects:

• Move: short beep
• Turn: different beep
• Pickup: ascending notes
• Goal reached: victory fanfare
• Crash: error buzz
• Loop: subtle click
• Button click: UI click

I'll use Web Audio API for these.

OK, I'm going to write the code now. Let me create the file.

Let me think about the canvas rendering in more detail:

Cell size: I'll calculate it based on the canvas size and grid dimensions. For a 7x5 grid, if the canvas is 420x300, each cell is 60x60.

Drawing:

1. Clear canvas
2. Draw grid background (dark cells with subtle borders)
3. Draw walls (solid blocks)
4. Draw gems (amber diamonds with sparkle)
5. Draw goal (glowing teal star)
6. Draw robot (cute robot character)
7. Draw particles (for effects)

For the robot, I'll draw it at the interpolated position (for smooth animation). The robot has:

• A rounded rectangle body
• Two eyes
• An antenna
• A directional indicator (arrow or triangle pointing in the facing direction)

Let me draw the robot facing right by default, and rotate the canvas when drawing for other directions.

Actually, for the turning animation, I'll interpolate the angle. The robot's angle is:

• Right: 0
• Down: 90° (π/2)
• Left: 180° (π)
• Up: 270° (3π/2)

When turning right, angle increases by 90°. When turning left, angle decreases by 90°.

For smooth animation, I'll interpolate between the old and new angles.

OK, let me now write the complete code. I'll create it as a single file.

Let me also think about the level data structure:

Grid characters:

• '.' = empty
• '#' = wall
• 'R' = robot start
• 'G' = goal
• '*' = gem

Let me now write the complete game. I'll create the file.

Let me think about one more thing: the program list UI. Each command is shown as a card with:

• An icon
• A label
• A number (position in the program)
• A delete button (×)
• For LOOP_START: a count adjuster (- count +)
• For IF_START: the condition type

The cards are color-coded by type. Loop and if blocks are indented to show nesting.

To show nesting, I calculate the depth of each command and add left padding accordingly. I also draw a colored left border or background to visually group the nested blocks.

Let me now write the code. I'll create the complete file in one go.

Actually, I realize this is going to be a very long file. Let me write it in sections and assemble it. But since I need to write it as a single file, let me just write it all at once.

Let me plan the JavaScript structure:

OK, I have a clear plan. Let me now write the complete code.

Let me think about the execution flow more carefully:

1. Player clicks "Run"
2. Reset robot to start position
3. Set pc = 0, execStack = [], isRunning = true
4. Start execution loop: a. If pc >= program.length, finish execution b. Get current instruction c. Highlight current instruction in UI d. Execute instruction (may trigger animation) e. Wait for animation to complete (if any) f. Wait for speed delay g. pc++ (or jump for loops/ifs) h. Go to step a
5. When execution finishes: a. If robot on goal and all gems collected: success! b. Otherwise: failed

For the animation wait, I need to coordinate between the execution loop and the animation system. I'll use a callback approach:

Actually, let me use a simpler approach. I'll use async/await with a sleep function:

This is clean and easy to understand. Let me use this approach.

OK, let me now write the complete code. I'll create the file.

Let me also think about the visual polish:

• Grid cells with subtle gradient
• Walls with a 3D-ish look (lighter top, darker bottom)
• Gems with a sparkle animation (rotating star or pulsing glow)
• Goal with a pulsing glow effect
• Robot with a subtle bobbing animation when idle
• Particle effects on gem pickup and goal reached
• Screen shake on crash
• Smooth transitions between screens

Let me also think about the start screen:

• Game title with a cool font effect
• Brief description
• "Start" button
• "Level Select" button (if there's saved progress)
• Maybe a brief tutorial

And the level select screen:

• Grid of level cards
• Each card shows level number, name, and stars earned
• Locked levels are grayed out
• Click to play

OK, I think I have everything planned. Let me now write the complete code.

Let me also think about the responsive design. On mobile:

• Canvas takes full width
• Program list below canvas
• Command palette below program list
• Controls at the bottom

On desktop:

• Canvas on the left (about 50% width)
• Program list on the right (about 50% width)
• Command palette below program list
• Controls at the bottom of the right panel

Let me use CSS flexbox for the layout.

OK, I'm going to write the code now. Let me create the file.

One more consideration: I need to make sure the game is accessible and works with both mouse/touch and keyboard. For keyboard:

• Arrow keys / WASD: not applicable (this is a programming game, not direct control)
• Space: Run/Stop program
• R: Reset
• C: Clear program
• 1-9: Add command (number keys correspond to command palette buttons)
• Escape: Go back to level select

Actually, for a programming game, keyboard shortcuts for adding commands would be nice:

• M: Move Forward
• L: Turn Left
• R: Turn Right (conflict with Reset... let me use T for Turn Right)
• P: Pick Up
• O: Loop Start
• E: Loop End
• I: If Wall
• G: If Goal (conflict... let me use different keys)

Hmm, this is getting complicated. Let me just use number keys 1-9 for the command palette buttons, and Space for Run/Stop, R for Reset, C for Clear.

Actually, let me keep keyboard support simple:

• Space: Run/Stop
• R: Reset level
• C: Clear program
• Escape: Back to level select

And for touch/mobile, all interactions are through buttons.

OK, let me now write the complete code. I'll create the file.

Let me think about the file size. This is going to be a large file, probably 2000+ lines. Let me write it efficiently.

Let me start writing now. I'll create the file in one go.

Actually, let me reconsider the game concept one more time. I want to make sure this is:

1. Unique - no other game in the arcade is a programming puzzle
2. Useful - teaches programming concepts
3. Fun - engaging gameplay loop
4. Polished - good visuals and UX
5. Works - no bugs

I'm confident this is a good choice. Let me write the code.

Let me also think about the name. "Code Quest" is good. Other options:

• "Bot Quest"
• "Robot Riddle"
• "Logic Lab"
• "Code Bot"
• "Program Quest"
• "Byte Bot"
• "Algorithm Adventure"

I'll go with "Code Quest" - it's clear, catchy, and descriptive.

Let me now write the complete game. I'll create the file at /space/games/code-quest/index.html.

Let me write the code now. I'll be comprehensive and make it polished.

Actually, I want to make sure the game has enough depth. Let me add a few more features:

1. Tutorial overlay on level 1 - shows arrows pointing to the command palette and explains how to add commands
2. Error messages - clear feedback when the program fails
3. Execution highlight - the current instruction is highlighted during execution
4. Robot expressions - the robot's eyes change based on state (happy when winning, X eyes when crashing)
5. Trail effect - the robot leaves a subtle trail as it moves
6. Grid coordinates - optional display of grid coordinates for debugging

Let me also add a "Step" button that executes one instruction at a time, for debugging.

OK, let me now write the code. I'll create the complete file.

Let me think about the level definitions one more time. I need to make sure each level is solvable:

Level 1: "First Steps" (5x5)

R(2,0)→right, G(2,3). MOVE x3. ✓ Par: 3

Level 2: "Right Turn" (5x5)

R(1,0)→right, G(3,3). MOVE,MOVE,MOVE,TURN_RIGHT,MOVE,MOVE. ✓ Par: 6

Level 3: "Gem Collector" (5x5)

R(1,0)→right, *(1,2), G(3,2). MOVE,MOVE,PICKUP,MOVE,TURN_RIGHT,MOVE,MOVE. ✓ Par: 7

Level 4: "The Long Walk" (9x3)

R(1,0)→right, G(1,8). LOOP(8),MOVE,END. ✓ Par: 3

Level 5: "Around the Wall" (7x5)

R(1,0)→right, wall(1,2), G(1,5). MOVE,TURN_RIGHT,MOVE,TURN_LEFT,MOVE,MOVE,MOVE. ✓ Par: 7

Level 6: "Double Gems" (7x3)

R(1,0)→right, *(1,2), *(1,5), G(1,6). LOOP(2),MOVE,MOVE,PICKUP,END,MOVE. ✓ Par: 6

Level 7: "Loop Maze" (7x7)

R(1,0)→right, G(5,6). LOOP(6),MOVE,END,TURN_RIGHT,LOOP(4),MOVE,END. ✓ Par: 7

Level 8: "The Detour" (7x5)

R(1,0)→right, walls(1,2),(1,3),(1,4), G(1,6). MOVE,TURN_RIGHT,MOVE,TURN_LEFT,MOVE,MOVE,MOVE,MOVE,TURN_LEFT,MOVE,TURN_RIGHT,MOVE. Wait, let me trace this: (1,0)→right. MOVE→(1,1). Wall at (1,2). TURN_RIGHT→down. MOVE→(2,1). TURN_LEFT→right. MOVE→(2,2). MOVE→(2,3). MOVE→(2,4). MOVE→(2,5). MOVE→(2,6). TURN_LEFT→up. MOVE→(1,6)=G! That's: MOVE,TR,MOVE,TL,MOVE,MOVE,MOVE,MOVE,MOVE,TL,MOVE = 11 blocks. Or: MOVE,TR,MOVE,TL,LOOP(5),MOVE,END,TL,MOVE = 9 blocks. Par: 9.

Level 9: "Gem Spiral" (7x7)

Hmm, this is complex. Let me simplify.

Level 9: "Gem Path" (7x5)

R(1,0)→right, *(1,2), *(1,4), G(1,6). MOVE,MOVE,PICKUP,MOVE,MOVE,PICKUP,MOVE,MOVE = 8 blocks. Or: LOOP(2),MOVE,MOVE,PICKUP,END,MOVE,MOVE = 7 blocks. Par: 7.

Hmm, this is similar to level 6. Let me make it different.

Level 9: "L-Shape" (7x7)

R(1,0)→right, gems at (2,1),(3,1),(4,1),(5,1), G(5,5). Path: TURN_RIGHT (down), LOOP(4), MOVE, PICKUP, END, MOVE, TURN_LEFT (right), LOOP(4), MOVE, END. Wait: R(1,0)→right. TURN_RIGHT→down. LOOP(4): MOVE→(2,0), PICKUP... but gem is at (2,1), not (2,0).

Let me fix the gem positions:

Gems at (2,1),(3,1),(4,1),(5,1). R at (1,0)→right. TURN_RIGHT→down. MOVE→(2,0). TURN_LEFT→right. MOVE→(2,1). PICKUP. TURN_RIGHT→down. MOVE→(3,1). PICKUP. MOVE→(4,1). PICKUP. MOVE→(5,1). PICKUP. TURN_LEFT→right. LOOP(4),MOVE,END. That's a lot of blocks. Let me simplify.

Actually, let me just make level 9 a simpler level:

Level 9: "Crossroads" (7x7)

R(2,0)→right, gems at (1,3),(2,2),(3,3), G(2,4). Path: MOVE,MOVE,PICKUP,TURN_LEFT,MOVE,PICKUP,TURN_RIGHT,TURN_RIGHT,MOVE,MOVE,PICKUP,TURN_LEFT,TURN_LEFT,MOVE,MOVE. This is getting complicated. Let me simplify.

Level 9: "Square Dance" (7x7)

This is too complex. Let me just make simpler levels.

OK, I'm going to stop overthinking the levels and just code

OK, I have 30 games. Let me think about what's missing and create something unique.

Looking at the list, there's no programming/coding puzzle game. I'll create "Code Quest" - a visual programming puzzle game where you control a robot on a grid using block-based programming commands (move, turn, pick up, loops, conditionals). This is educational, unique, and fun.

Let me now write the complete game. I'll create it at /space/games/code-quest/index.html.

This is going to be a large file. Let me write it carefully.

All checks pass. Now let me verify the levels are solvable by writing a test that simulates the execution engine. Let me also check for any logical issues in the level designs.

The error is because some grid rows have different lengths. Let me check the grid definitions more carefully. The issue is likely with the "Spiral Path" and "Master Coder" levels having inconsistent row lengths. Let me check and fix those levels.

Let me first check the grid row lengths for all levels.

I see the issue. Level 12 "Master Coder" has mismatched row lengths:

• Row 2: ".#######.#" (10 chars) - should be 9
• Row 5: "#.#*G#.#" (8 chars) - should be 9

Let me fix these rows. The grid should be 9 columns wide.

Row 2 should be: ".#######." (9 chars) - remove the trailing # Actually, let me redesign the Master Coder level to be a proper 9x9 grid with a valid path.

Let me think about this level. I want a complex maze with a gem and a goal.

Wait, let me think about this more carefully. I need a 9x9 grid with a solvable path from R to G, with a gem to collect.

Let me design a simpler but still challenging maze:

Row 5: "#.#G...#" = 9 chars. (0,5)='#', (1,5)='.', (2,5)='#', (3,5)='', (4,5)='G', (5,5)='.', (6,5)='.', (7,5)='.', (8,5)='#'

Let me trace the path: R at (0,1) facing right.

Row 1: R . . . . . . . # -> can go right to (7,1), wall at (8,1) Row 2: . # # # # # # # . -> can only be at (0,2) or (8,2) Row 3: # . . . . . . . # -> can go from (1,3) to (7,3) Row 4: # . # # # # # . # -> can be at (1,4) or (7,4) Row 5: # . # * G . . . # -> can be at (1,5), (3,5)=gem, (4,5)=goal, (5,5)-(7,5) Row 6: # . # # # # # . # -> can be at (1,6) or (7,6) Row 7: # . . . . . . . # -> can go from (1,7) to (7,7) Row 8: . . . . . . . . . -> all open

Path from (0,1) to (4,5) with gem at (3,5):

1. (0,1) → right → (1,1),(2,1),...,(7,1) [7 moves]
2. Turn right (down) → (7,2) [1 move]
3. Turn right (left) → (6,2)? No, (6,2)='#'. Wait, row 2 is ".#######." so (0,2)='.', (1,2)='#',...,(7,2)='#', (8,2)='.' So from (7,1) going down, (7,2)='#'. Wall!

Hmm, that doesn't work. Let me reconsider.

From (7,1) facing right, wall at (8,1). Turn right (down). (7,2)='#'. Wall. Turn right (left). (6,1)='.'. Can go left. Turn right (up). (7,0)='.'. Can go up.

So from (7,1), I can go up to (7,0) or left back. Going up to (7,0), then left along row 0 to (0,0), then down to (0,1)... that's going backwards.

Let me redesign the maze. The issue is that row 2 blocks access from row 1 to row 3 except through (0,2) or (8,2).

From (7,1), I can't go down because (7,2)='#'. I need to go to (8,1) but that's also '#'.

Wait, (8,1)='#'. So from (7,1) I can only go left or up.

Let me go left from (7,1) to (0,1)... that's back to start. Then from (0,1) go down to (0,2) which is '.'. Then down to (0,3) which is '#'. Wall!

Hmm, (0,3)='#'. So from (0,2) I can only go right to (1,2)='#'. Wall. Or down to (0,3)='#'. Wall.

This maze is broken. Let me redesign it completely.

Let me create a simpler but still interesting maze for level 12:

Hmm, this is getting complicated. Let me just make a clean, solvable maze.

Actually, let me simplify the Master Coder level. Instead of a complex maze, let me make it a level that requires combining loops, conditionals, and pickups in a more open space:

R at (0,1) facing right. Gem at (4,6). G at (7,7). This is more of an open level with a pyramid obstacle. The robot needs to navigate around the pyramid, collect the gem, and reach the goal.

Path:

• Right 7 to (7,1)
• Turn right (down), down 5 to (7,6)
• Turn left (left), left 3 to (4,6) - collect gem
• Turn left (down), down 1 to (4,7)
• Turn right (right), right 3 to (7,7) - goal!

That's: MOVE x7, TR, MOVE x5, TL, MOVE x3, PICKUP, TL, MOVE, TR, MOVE x3 = 7 + 1 + 5 + 1 + 3 + 1 + 1 + 1 + 1 + 3 = 24 blocks without loops With loops: LOOP(7),MOVE,END, TR, LOOP(5),MOVE,END, TL, LOOP(3),MOVE,END, PICKUP, TL, MOVE, TR, LOOP(3),MOVE,END = 3 + 1 + 3 + 1 + 3 + 1 + 1 + 1 + 1 + 3 = 18 blocks

Par: 18. That works!

But wait, let me verify the grid is consistent (all 9 chars): Row 0: "........." = 9 ✓ Row 1: "R........" = 9 ✓ Row 2: "........." = 9 ✓ Row 3: "....#...." = 9 ✓ Row 4: "...###..." = 9 ✓ Row 5: "..#####.." = 9 ✓ Row 6: "....*...." = 9 ✓ Row 7: ".......G." = 9 ✓ Row 8: "........." = 9 ✓

All 9 chars.

Now let me also fix the Spiral Path level. Let me verify it's solvable:

Row 0: ....... Row 1: R.....# Row 2: #####.# Row 3: #.....# Row 4: #.###.# Row 5: #.#G#.# Row 6: #.#####

R at (0,1) facing right. G at (3,5).

Let me trace: (0,1) → right → (1,1),(2,1),(3,1),(4,1),(5,1). Wall at (6,1)='#'. Turn right (down). (5,2)='.' (row 2: '#####.#'). Move to (5,2). (5,3)='.' (row 3: '#.....#'). Move to (5,3). (5,4)='.' (row 4: '#.###.#'). Move to (5,4). (5,5)='#' (row 5: '#.#G#.#'). Wall! Turn right (left). (4,4)='#' (row 4: '#.###.#'). Wall! Turn right (up). (5,3) already visited. Turn right (right). (6,4)='#' (row 4: '#.###.#'). Wall!

Dead end at (5,4)! The spiral path is broken.

Let me redesign the Spiral Path level. I need a proper spiral that's solvable.

Let me design a spiral maze:

Wait, let me think about this more carefully. A spiral path should look like:

Hmm, this is getting complicated. Let me just make a simpler maze that works:

R at (0,1) facing right. G at (3,5).

Path: (0,1) → right → (1,1),(2,1),(3,1),(4,1),(5,1). Wall at (6,1)='#'. Turn right (down). (5,2)='.' (row 2: '.#####.' -> (0,2)='.', (1,2)='#', (2,2)='#', (3,2)='#', (4,2)='#', (5,2)='.', (6,2)='.'). Move to (5,2). (5,3)='.' (row 3: '.#...#.' -> (5,3)='.'). Move to (5,3). (5,4)='.' (row 4: '.#.#.#.' -> (5,4)='.'). Move to (5,4). (5,5)='.' (row 5: '.#.G.#.' -> (5,5)='.'). Move to (5,5). Turn left (left). (4,5)='#' (row 5: '.#.G.#.' -> (4,5)='.'). Wait, let me re-read row 5: '.#.G.#.' (0,5)='.', (1,5)='#', (2,5)='.', (3,5)='G', (4,5)='.', (5,5)='#', (6,5)='.'

Hmm, (5,5)='#'. So from (5,4) going down, (5,5)='#'. Wall!

Let me re-examine. Row 4: '.#.#.#.' (0,4)='.', (1,4)='#', (2,4)='.', (3,4)='#', (4,4)='.', (5,4)='#', (6,4)='.'

So (5,4)='#'. From (5,3) going down, (5,4)='#'. Wall!

I keep making mistakes with the grid. Let me be very careful.

Let me design a simple, clean spiral:

OK let me be very precise. 7 columns, indices 0-6.

Row 0: . . . . . . . Row 1: R . . . . # . Row 2: . # # # # # . Row 3: . # . . . # . Row 4: . # . # . # . Row 5: . # . G # # . Row 6: . # # # # # .

Wait, this doesn't form a spiral. Let me think about what a spiral path looks like.

A spiral path goes: right along the top, down the right side, left along the bottom, up the left side, then right again in the inner spiral, etc.

For a 7x7 grid:

R at (0,0) facing right. G at (3,3).

Path: (0,0) → right → (1,0),(2,0),(3,0),(4,0),(5,0). Wall at (6,0)='#'. Turn right (down). (5,1)='.' (row 1: '. # # # # # .' -> (5,1)='.'). Move to (5,1). (5,2)='.' (row 2: '. # . . . # .' -> (5,2)='.'). Move to (5,2). (5,3)='.' (row 3: '. # . G . # .' -> (5,3)='.'). Move to (5,3). Turn left (left). (4,3)='.' (row 3: (4,3)='.'). Move to (4,3). (3,3)='G'. Move to (3,3). Goal!

Let me verify the grid: Row 0: "R....#." = 7 chars ✓ Row 1: ".#####." = 7 chars ✓ Row 2: ".#...#." = 7 chars ✓ Row 3: ".#.G.#." = 7 chars ✓ Row 4: ".#.###." = 7 chars ✓ Row 5: ".#....." = 7 chars ✓ Row 6: ".######" = 7 chars ✓

All 7 chars.

Path: MOVE x5, TR, MOVE x3, TL, MOVE x2 = 5 + 1 + 3 + 1 + 2 = 12 blocks without loops With loops: LOOP(5),MOVE,END, TR, LOOP(3),MOVE,END, TL, LOOP(2),MOVE,END = 3 + 1 + 3 + 1 + 3 = 11 blocks

Par: 11. But I had par: 14. Let me adjust to 11.

Actually, wait. The spiral should be more complex. Let me add more turns:

R at (0,0) facing right. G at (4,3).

Row 0: R . . . . # . Row 1: . # # # # # . Row 2: . # . . . # . Row 3: . # . # G # . Row 4: . # . # . # . Row 5: . # . # . # . Row 6: . # # # # # .

Path: (0,0) → right → (1,0),(2,0),(3,0),(4,0). Wall at (5,0)='#'. Turn right (down). (4,1)='#' (row 1: '.#####.' -> (4,1)='#'). Wall!

Hmm, that doesn't work. The opening in row 1 is at (0,1) and (6,1), not at (5,1).

Let me reconsider. From (4,0), wall at (5,0). Turn right (down). (4,1)='#'. Wall. Turn right (left). (3,0) already visited. Turn right (up). (4,-1) out of bounds.

Dead end! The problem is the wall at (5,0) blocks the path, and there's no opening below.

I need the wall at the end of row 0 to be at (6,0), not (5,0), so the robot can turn down at (5,0):

Path: (0,0) → right → (1,0),(2,0),(3,0),(4,0),(5,0). Wall at (6,0)='#'. Turn right (down). (5,1)='#' (row 1: '.#####.' -> (5,1)='#'). Wall!

Still blocked! The opening in row 1 is at (0,1) and (6,1), but the robot is at (5,0) and can't reach (6,1) because (6,0) is a wall.

I need to make the wall at (6,0) not exist, or make the opening at (5,1):

From (5,0), turn right (down). (5,1)='#'. Still wall!

OK, the issue is that the wall in row 1 goes from (1,1) to (5,1), so (5,1) is a wall. I need the opening to be at (5,1) instead:

Let me take a completely different approach. Let me just make a simple maze that works:

R at (0,1) facing right. G at (3,5).

Row 0: . . . . . . . Row 1: R . . . . . . Row 2: . # # # # # . Row 3: . # . . . # . Row 4: . # . # . # . Row 5: . # . G . # . Row 6: . # # # # # .

Path: (0,1) → right → (1,1),(2,1),(3,1),(4,1),(5,1),(6,1). No wall at (6,1) since row 1 is "R......". Turn right (down). (6,2)='.' (row 2: '.#####.' -> (6,2)='.'). Move to (6,2). (6,3)='.' (row 3: '.#...#.' -> (6,3)='.'). Wait, row 3 is '.#...#.' -> (0,3)='.', (1,3)='#', (2,3)='.', (3,3)='.', (4,3)='.', (5,3)='#', (6,3)='.'. Move to (6,3). (6,4)='.' (row 4: '.#.#.#.' -> (6,4)='.'). Move to (6,4). (6,5)='.' (row 5: '.#.G.#.' -> (6,5)='.'). Wait, row 5 is '.#.G.#.' -> (0,5)='.', (1,5)='#', (2,5)='.', (3,5)='G', (4,5)='.', (5,5)='#', (6,5)='.'. Move to (6,5). Turn left (left). (5,5)='#'. Wall! Turn left (down). (6,6)='#' (row 6: '.#####.' -> (6,6)='.'). Wait, row 6 is '.#####.' -> (0,6)='.', (1,6)='#', (2,6)='#', (3,6)='#', (4,6)='#', (5,6)='#', (6,6)='.'. (6,6)='.'. Move to (6,6). Turn left (right). Out of bounds. Turn left (up). Already visited.

Hmm, from (6,5) I can go down to (6,6) but then I'm stuck. I need to go left from (6,5) but (5,5)='#'.

The issue is that the inner corridor (row 3-5) is blocked on the right side by walls at (5,3),(5,4),(5,5). I need an opening.

Let me redesign:

The inner corridor is rows 3-5, columns 2-4. The walls are at columns 1 and 5. The openings to enter the inner corridor are at (0,2)/(0,3)/(0,4)/(0,5)/(0,6) on the left, and (6,2)/(6,3)/(6,4)/(6,5)/(6,6) on the right.

From (6,5), I need to go left. But (5,5)='#'. So I can't enter the inner corridor from the right at row 5.

I can enter from (6,3) going left to (5,3)='#'. Also blocked!

Wait, row 3 is '.#...#.' -> (5,3)='#'. So the inner corridor is columns 2-4, and column 5 is wall in all inner rows.

The only way to enter the inner corridor is from the top or bottom. Row 2 is '.#####.' so (1,2)='#',...,(5,2)='#'. Only (0,2) and (6,2) are open. But those are outside the inner corridor.

Actually, the inner corridor is accessible from:

• (2,2) from above? (2,2)='#' (row 2). No.
• The inner corridor columns 2-4 in rows 3-5 are enclosed by walls on all sides:
  • Top: row 2 has walls at (1,2)-(5,2)
  • Bottom: row 6 has walls at (1,6)-(5,6)
  • Left: column 1 has walls at (1,3),(1,4),(1,5)
  • Right: column 5 has walls at (5,3),(5,4),(5,5)

So the inner corridor is completely enclosed! There's no way in. This maze is broken.

I need to add an opening. Let me make (5,3) an opening:

Actually, let me just make (5,3)='.' by changing row 3 from '.#...#.' to '.#....#': Wait, '.#....#' is 7 chars: (0,3)='.', (1,3)='#', (2,3)='.', (3,3)='.', (4,3)='.', (5,3)='.', (6,3)='#'

Hmm, but then (6,3)='#' which blocks the right side corridor. Let me think differently.

OK, I'm overcomplicating this. Let me just make a simple, clean maze that I know works:

Hmm, this is still complex. Let me just go with a very simple maze:

Actually, you know what, let me just make the Spiral Path level a simpler maze that I can verify is solvable. I'll trace it step by step.

Let me use this grid:

Wait, this isn't really a spiral. Let me just make a clean U-shaped maze:

R at (0,1) facing right. G at (4,4). Wall at (3,1),(3,2),(3,3),(3,4).

Path: Right 2 to (2,1). Wall at (3,1). Turn right (down). Down 3 to (2,4). Turn left (right). Right 2 to (4,4). Goal!

MOVE, MOVE, TR, MOVE, MOVE, MOVE, TL, MOVE, MOVE = 9 blocks With loops: LOOP(2),MOVE,END, TR, LOOP(3),MOVE,END, TL, LOOP(2),MOVE,END = 3+1+3+1+3 = 11 blocks

Hmm, the loop version is longer. That's because the distances are short. Let me make it longer:

R at (0,1) facing right. G at (6,4). Wall at (5,1),(5,2),(5,3),(5,4).

Path: Right 4 to (4,1). Wall at (5,1). Turn right (down). Down 3 to (4,4). Turn left (right). Right 2 to (6,4). Goal!

MOVE x4, TR, MOVE x3, TL, MOVE x2 = 4+1+3+1+2 = 11 blocks With loops: LOOP(4),MOVE,END, TR, LOOP(3),MOVE,END, TL, LOOP(2),MOVE,END = 3+1+3+1+3 = 11 blocks

Same! Loops don't help here because the distances are too short. Let me make it a proper spiral with longer corridors.

Actually, let me just make the Spiral Path level a different kind of maze. Let me use a zigzag pattern:

Hmm, this is a zigzag but it's 9x9 which is big. Let me trace: R at (0,1) facing right. G at (8,3).

Row 1: R........ -> all open Row 2: ########. -> walls (0,2)-(7,2), opening at (8,2) Row 3: ........G -> all open, G at (8,3)

Path: Right 8 to (8,1). Turn right (down). Down to (8,2)='.'. Down to (8,3)=G. Goal!

MOVE x8, TR, MOVE x2 = 8+1+2 = 11 blocks With loops: LOOP(8),MOVE,END, TR, LOOP(2),MOVE,END = 3+1+3 = 7 blocks

Par: 7. But this is too simple - it's just a straight path with one turn. Not really a "spiral."

OK, let me just make it a proper maze with multiple turns. Let me use a 7x7 grid:

I already showed this doesn't work because the inner corridor is enclosed. Let me add an opening at (5,3):

Wait, I need to be more careful. Let me trace this:

Row 0: . . . . . . . Row 1: R . . . . . # Row 2: . # # # # # . Row 3: . # . . . . . <- (0,3)='.', (1,3)='#', (2,3)='.', (3,3)='.', (4,3)='.', (5,3)='.', (6,3)='.' Row 4: . # . # . # # <- (0,4)='.', (1,4)='#', (2,4)='.', (3,4)='#', (4,4)='.', (5,4)='#', (6,4)='#' Row 5: . # . G . # . <- (0,5)='.', (1,5)='#', (2,5)='.', (3,5)='G', (4,5)='.', (5,5)='#', (6,5)='.' Row 6: . # # # # # .

R at (0,1) facing right. G at (3,5).

Path: (0,1) → right → (1,1),(2,1),(3,1),(4,1),(5,1). Wall at (6,1)='#'. Turn right (down). (5,2)='.' (row 2: '.#####.' -> (5,2)='.'). Wait, row 2 is '.#####.' -> (0,2)='.', (1,2)='#', (2,2)='#', (3,2)='#', (4,2)='#', (5,2)='#', (6,2)='.'.

(5,2)='#'. Wall!

The opening in row 2 is at (0,2) and (6,2), not (5,2). So from (5,1) I can't go down.

Let me go to (6,1)... but (6,1)='#'. I can't.

From (5,1), I can go left, up, or... (5,1) is blocked on the right by (6,1)='#' and below by (5,2)='#'.

I need to go back left and enter through (0,2): (0,1) → left? No, robot faces right. I need to go all the way left. Actually, from (5,1) I can turn right (down) but (5,2)='#'. Turn right (left). Go left to (0,1). Turn right (up). (0,0)='.'. Go up to (0,0). Turn right (right). Already came from there.

Hmm, this doesn't work either. The problem is the outer corridor (row 1) is blocked on the right by (6,1)='#', and the only way down is through (0,2) or (6,2), but (6,1)='#' blocks access to (6,2).

Let me remove the wall at (6,1):

But then the inner corridor is still enclosed. I need an opening somewhere.

Let me make (5,3) an opening: Row 3: '.#...#.' -> change to '.#....#' Wait, '.#....#' = (0,3)='.', (1,3)='#', (2,3)='.', (3,3)='.', (4,3)='.', (5,3)='.', (6,3)='#'

But then (6,3)='#' blocks the right corridor. Let me keep (6,3)='.' and make (5,3)='.': Row 3: '.#....' = only 6 chars. Need 7. Row 3: '.#...#.' -> I need to change (5,3) from '#' to '.': '.#....' no, that's 6 chars.

'.#...#.' has 7 chars: positions 0-6 are '.','#','.','.','.','#','.'

If I change position 5 from '#' to '.': '.#.....' = 7 chars: '.','#','.','.','.','.','.'

But then there's no wall on the right side of the inner corridor at row 3. The inner corridor would be open to the right corridor.

Let me think about this differently. I want:

• An outer corridor (row 1, columns 0-6)
• A wall separating outer from inner (row 2, with openings)
• An inner corridor (rows 3-5, columns 2-4)
• Walls separating inner from outer (columns 1 and 5, with one opening)
• Goal inside the inner corridor

Let me put the opening at (5,3):

OK, '.#...#.' is 7 chars. If I want (5,3) to be '.', I change it to '.#...#.' -> '.#....' is 6 chars.

I think the issue is I'm confusing myself. Let me just carefully design the grid character by character.

7 columns (0-6), 7 rows (0-6).

I want:

• (0,1) = R (robot start, facing right)
• (3,5) = G (goal)
• Outer corridor: row 1, all open
• Wall row: row 2, walls at (1,2)-(5,2), openings at (0,2) and (6,2)
• Inner corridor: rows 3-5, columns 2-4
• Inner walls: column 1 at rows 3-5, column 5 at rows 3-5
• Opening in inner wall: at (5,3) - so (5,3)='.' instead of '#'
• Bottom wall: row 6, walls at (1,6)-(5,6), openings at (0,6) and (6,6)
• Inner wall within corridor: at (3,4)='#' to make it spiral

Grid: Row 0: . . . . . . . -> "......." Row 1: R . . . . . . -> "R......" Row 2: . # # # # # . -> ".#####." Row 3: . # . . . . . -> ".#....." <- (5,3)='.' (opening!) Row 4: . # . # . # . -> ".#.#.#." <- (3,4)='#' (inner wall) Row 5: . # . G . # . -> ".#.G.#." Row 6: . # # # # # . -> ".#####."

Wait, but now the inner corridor at row 3 is columns 2-6 (since (5,3)='.' and (6,3)='.'). That's too open. Let me keep (6,3)='#' and only open (5,3):

Row 3: . # . . . . # -> ".#....#"

Hmm, but then (6,3)='#' blocks the right outer corridor at row 3. The right outer corridor is column 6, rows 2-6. If (6,3)='#', the right corridor is broken.

Actually, I don't need a right outer corridor. The robot enters from the top, goes right, comes down through the opening at (6,2), then goes left to (5,3) opening, enters the inner corridor, and navigates to the goal.

Let me redesign: Row 0: . . . . . . . -> "......." Row 1: R . . . . . # -> "R.....#" Row 2: . # # # # # . -> ".#####." Row 3: . # . . . . # -> ".#....#" Row 4: . # . # . # # -> ".#.#.##" Row 5: . # . G . # . -> ".#.G.#." Row 6: . # # # # # . -> ".#####."

R at (0,1) facing right. G at (3,5).

Path: (0,1) → right → (1,1),(2,1),(3,1),(4,1),(5,1). Wall at (6,1)='#'. Turn right (down). (5,2)='#' (row 2: '.#####.'). Wall!

Still blocked! The opening in row 2 is at (0,2) and (6,2), but (6,1)='#' blocks access to (6,2).

I need to remove the wall at (6,1) so the robot can reach (6,2): Row 1: R . . . . . . -> "R......"

Then: (0,1) → right → (1,1),...,(6,1). Turn right (down). (6,2)='.' (row 2: '.#####.' -> (6,2)='.'). Move to (6,2). (6,3)='#' (row 3: '.#....#'). Wall! Turn right (left). (5,2)='#'. Wall! Turn right (up). (6,1) already visited. Turn right (right). Out of bounds.

Dead end at (6,2)! Because (6,3)='#'.

I need (6,3)='.': Row 3: . # . . . . . -> ".#....."

Then: (6,2) → down → (6,3)='.'. Move to (6,3). (6,4)='#' (row 4: '.#.#.##'). Wall! Turn right (left). (5,3)='.' (row 3: '.#.....' -> (5,3)='.'). Wait, I'm at (6,3) facing down. Turn right = left. (5,3)='.'. Move to (5,3). (4,3)='.'. Move to (4,3). (3,3)='.'. Move to (3,3). (2,3)='.'. Move to (2,3). (1,3)='#'. Wall! Turn right (up). (2,2)='#'. Wall! Turn right (right). Already visited. Turn right (down). (2,4)='.' (row 4: '.#.#.##' -> (2,4)='.'). Move to (2,4). (2,5)='.' (row 5: '.#.G.#.' -> (2,5)='.'). Move to (2,5). Turn left (right). (3,5)='G'. Move to (3,5). Goal!

Let me verify the full path: (0,1) → right 6 → (6,1) → TR → (6,2) → (6,3) → TR → (5,3) → (4,3) → (3,3) → (2,3) → TR → (2,4) → (2,5) → TL → (3,5) = G

Commands: MOVE x6, TR, MOVE x2, TR, MOVE x4, TR, MOVE x2, TL, MOVE = 6 + 1 + 2 + 1 + 4 + 1 + 2 + 1 + 1 = 19 blocks without loops

With loops: LOOP(6),MOVE,END, TR, LOOP(2),MOVE,END, TR, LOOP(4),MOVE,END, TR, LOOP(2),MOVE,END, TL, MOVE = 3 + 1 + 3 + 1 + 3 + 1 + 3 + 1 + 1 = 17 blocks

Par: 17. But I had 14. Let me adjust.

Actually, let me verify the grid: Row 0: "......." = 7 ✓ Row 1: "R......" = 7 ✓ Row 2: ".#####." = 7 ✓ Row 3: ".#....." = 7 ✓ Row 4: ".#.#.##" = 7 ✓ Row 5: ".#.G.#." = 7 ✓ Row 6: ".#####." = 7 ✓

All 7 chars.

But wait, let me double-check row 4: ".#.#.##" (0,4)='.', (1,4)='#', (2,4)='.', (3,4)='#', (4,4)='.', (5,4)='#', (6,4)='#'

And row 5: ".#.G.#." (0,5)='.', (1,5)='#', (2,5)='.', (3,5)='G', (4,5)='.', (5,5)='#', (6,5)='.'

From (2,4) facing down, (2,5)='.'. Move to (2,5). From (2,5) facing down, (2,6)='#' (row 6: '.#####.' -> (2,6)='#'). Wall. Turn left (right). (3,5)='G'. Move to (3,5). Goal!

Yes, this works! Let me also check: is there a gem in this level? I didn't include one. Let me add a gem to make it more interesting.

Let me add a gem at (4,5): Row 5: ".#.G*#." -> wait, that would be (4,5)='*'. But I need to check if the path goes through (4,5).

From the path above, the robot goes (2,5) → TL → (3,5) = G. It doesn't go through (4,5).

Let me redesign the path to include a gem. Or I can put the gem somewhere on the path.

Actually, let me put the gem at (4,3) which is on the path: Row 3: ".#...." -> (0,3)='.', (1,3)='#', (2,3)='.', (3,3)='.', (4,3)='', (5,3)='.', (6,3)='.'

Then the path would be: ... → (5,3) → (4,3) [PICKUP] → (3,3) → (2,3) → ...

Commands: LOOP(6),MOVE,END, TR, LOOP(2),MOVE,END, TR, LOOP(2),MOVE,END, PICKUP, MOVE, MOVE, TR, LOOP(2),MOVE,END, TL, MOVE = 3 + 1 + 3 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 = 21 blocks

Hmm, that's a lot. Let me simplify. Actually, let me not add a gem to this level and keep it as a pure navigation puzzle. The gem can be in other levels.

OK, let me finalize the Spiral Path level:

Par: 17. Actually, let me recalculate. The optimal solution with loops: LOOP(6),MOVE,END, TR, LOOP(2),MOVE,END, TR, LOOP(4),MOVE,END, TR, LOOP(2),MOVE,END, TL, MOVE = 3+1+3+1+3+1+3+1+1 = 17 blocks

But can we do better? Let me think...

Actually, from (2,3) I turn right (down) and go to (2,4),(2,5). Then turn left (right) to (3,5)=G. So: ...TR, MOVE, MOVE, TL, MOVE = 5 blocks for the last part. Or: TR, LOOP(2),MOVE,END, TL, MOVE = 1+3+1+1 = 6 blocks. Worse!

So the loop version is actually worse for short distances. The optimal is: MOVE x6, TR, MOVE x2, TR, MOVE x4, TR, MOVE x2, TL, MOVE = 19 blocks without loops Or with loops only for the long parts: LOOP(6),MOVE,END, TR, MOVE, MOVE, TR, LOOP(4),MOVE,END, TR, MOVE, MOVE, TL, MOVE = 3+1+2+1+3+1+2+1+1 = 15 blocks

Par: 15. Let me set it to 15.

Actually, I realize I should also check if there's a shorter path. Let me think...

From (0,1), can I go down first? (0,1) facing right. Turn right (down). (0,2)='.' (row 2: '.#####.' -> (0,2)='.'). Move to (0,2). (0,3)='.' (row 3: '.#.....' -> (0,3)='.'). Move to (0,3). (0,4)='.' (row 4: '.#.#.##' -> (0,4)='.'). Move to (0,4). (0,5)='.' (row 5: '.#.G.#.' -> (0,5)='.'). Move to (0,5). (0,6)='.' (row 6: '.#####.' -> (0,6)='.'). Move to (0,6). Turn left (right). (1,6)='#'. Wall! Turn left (up). Already visited.

Dead end at (0,6). So going down the left side doesn't help.

What about going down the left side and then right? (0,1) → TR → (0,2) → (0,3) → TR → (1,3)='#'. Wall! (0,3) → TR → (0,4) → (0,5) → TR → (1,5)='#'. Wall!

The left side is a dead end. The only way is through the right side.

So the optimal path is indeed through the right side. Let me set par to 15.

Now let me also fix the Master Coder level. Let me use the simpler design I came up with:

R at (0,1) facing right. Gem at (4,6). G at (7,7).

Path: (0,1) → right 7 → (7,1). TR (down). Down 5 → (7,6). TL (left). Left 3 → (4,6). PICKUP. TL (down). Down 1 → (4,7). TR (right). Right 3 → (7,7). Goal!

MOVE x7, TR, MOVE x5, TL, MOVE x3, PICKUP, TL, MOVE, TR, MOVE x3 = 7+1+5+1+3+1+1+1+1+3 = 24 blocks without loops

With loops: LOOP(7),MOVE,END, TR, LOOP(5),MOVE,END, TL, LOOP(3),MOVE,END, PICKUP, TL, MOVE, TR, LOOP(3),MOVE,END = 3+1+3+1+3+1+1+1+1+3 = 18 blocks

Par: 18.

Let me verify the grid: Row 0: "........." = 9 ✓ Row 1: "R........" = 9 ✓ Row 2: "........." = 9 ✓ Row 3: "....#...." = 9 ✓ Row 4: "...###..." = 9 ✓ Row 5: "..#####.." = 9 ✓ Row 6: "....*...." = 9 ✓ Row 7: ".......G." = 9 ✓ Row 8: "........." = 9 ✓

All 9 chars.

But wait, is there a shorter path? Let me check if the robot can go through the pyramid.

The pyramid walls are: Row 3: (4,3)='#' Row 4: (3,4)='#', (4,4)='#', (5,4)='#' Row 5: (2,5)='#', (3,5)='#', (4,5)='#', (5,5)='#', (6,5)='#'

The robot needs to go around the pyramid. From (0,1), it can go right along row 1 or row 2 (both open). Then it needs to go down. The pyramid blocks columns 2-6 at row 5, so the robot needs to go around either left (column 0-1) or right (column 7-8).

Going right: (0,1) → right 7 → (7,1) → down 5 → (7,6) → left 3 → (4,6) [pickup] → down 1 → (4,7) → right 3 → (7,7). 24 blocks.

Going left then around: (0,1) → down 5 → (0,6) → right 4 → (4,6) [pickup] → down 1 → (4,7) → right 3 → (7,7). = 5+4+1+1+3 = 14 blocks without loops! With loops: LOOP(5),MOVE,END, TR, LOOP(4),MOVE,END, PICKUP, TR, MOVE, TR, LOOP(3),MOVE,END Wait, let me recalculate.

(0,1) facing right. Turn right (down). Down 5 to (0,6). Turn left (right). Right 4 to (4,6). PICKUP. Turn left (down). Wait, I'm facing right. Turn left = up. That's wrong.

Let me re-trace: (0,1) facing right. TR (down). MOVE to (0,2). MOVE to (0,3). MOVE to (0,4). MOVE to (0,5). MOVE to (0,6). [5 moves] TL (right). MOVE to (1,6). MOVE to (2,6). MOVE to (3,6). MOVE to (4,6). [4 moves] PICKUP (gem at (4,6)). TL (up)? No, I need to go down to (4,7). I'm facing right. Turn right = down. TR (down). MOVE to (4,7). [1 move] TL (right). MOVE to (5,7). MOVE to (6,7). MOVE to (7,7). [3 moves] Goal!

Commands: TR, MOVE x5, TL, MOVE x4, PICKUP, TR, MOVE, TL, MOVE x3 = 1+5+1+4+1+1+1+3 = 17 blocks without loops

With loops: TR, LOOP(5),MOVE,END, TL, LOOP(4),MOVE,END, PICKUP, TR, MOVE, TL, LOOP(3),MOVE,END = 1+3+1+3+1+1+1+3 = 14 blocks

Par: 14! That's much better than 18. Let me set par to 14.

Wait, but I need to check if (0,2) through (0,6) are all open: Row 2: "........." -> (0,2)='.' ✓ Row 3: "....#...." -> (0,3)='.' ✓ Row 4: "...###..." -> (0,4)='.' ✓ Row 5: "..#####.." -> (0,5)='.' ✓ Row 6: "....*...." -> (0,6)='.' ✓

Yes, all open! And (1,6) through (3,6): Row 6: "........" -> (1,6)='.', (2,6)='.', (3,6)='.', (4,6)=''

Yes, all open! And (4,7): Row 7: ".......G." -> (4,7)='.'

Yes! And (5,7) through (7,7): Row 7: ".......G." -> (5,7)='.', (6,7)='.', (7,7)='G'

Yes! The path works.

So the optimal solution is 14 blocks with loops. Let me set par to 14.

But wait, can we do even better? Let me think...

What if we go down the left side, right to the gem, then continue right to the goal?

(0,1) → TR → (0,2) → (0,3) → (0,4) → (0,5) → (0,6) → TL → (1,6) → (2,6) → (3,6) → (4,6) [PICKUP] → (5,6) → (6,6) → (7,6) → TR → (7,7) = G

Wait, (5,6)='.' (row 6: "....*...." -> (5,6)='.'). (6,6)='.'. (7,6)='.'. (7,7)='G'.

Commands: TR, MOVE x5, TL, MOVE x7, PICKUP... wait, I need to pickup at (4,6) before continuing.

TR, MOVE x5, TL, MOVE x4, PICKUP, MOVE x3, TR, MOVE = 1+5+1+4+1+3+1+1 = 17 blocks without loops

With loops: TR, LOOP(5),MOVE,END, TL, LOOP(4),MOVE,END, PICKUP, LOOP(3),MOVE,END, TR, MOVE = 1+3+1+3+1+3+1+1 = 14 blocks

Same! But this path is simpler (fewer turns). Let me verify: (0,1) → TR (down) → (0,2) → (0,3) → (0,4) → (0,5) → (0,6) → TL (right) → (1,6) → (2,6) → (3,6) → (4,6) [PICKUP] → (5,6) → (6,6) → (7,6) → TR (down) → (7,7) = G

Yes! This works and is 14 blocks with loops.

Can we do better? What about: TR, LOOP(5),MOVE,END, TL, LOOP(7),MOVE,END... but we need to PICKUP in the middle of the 7 moves. We can't do that in a single loop.

What about using IF GEM? TR, LOOP(5),MOVE,END, TL, LOOP(7), IF GEM, PICKUP, END, MOVE, END, TR, MOVE = 1+3+1+3+3+1+1 = 13 blocks? Wait, let me count: TR (1), LOOP(5) (1), MOVE (1), END (1), TL (1), LOOP(7) (1), IF GEM (1), PICKUP (1), END (1), MOVE (1), END (1), TR (1), MOVE (1) = 13 blocks!

But does this work? The loop runs 7 times. Each iteration: check if gem, if so pickup, then move.

• Iteration 1: at (1,6), no gem, move to (2,6)
• Iteration 2: at (2,6), no gem, move to (3,6)
• Iteration 3: at (3,6), no gem, move to (4,6)
• Iteration 4: at (4,6), gem! pickup. move to (5,6)
• Iteration 5: at (5,6), no gem, move to (6,6)
• Iteration 6: at (6,6), no gem, move to (7,6)
• Iteration 7: at (7,6), no gem, move to (7,7)? Wait, (7,7) is the goal but we're facing right. (8,6) is out of bounds!

Hmm, the loop would try to move from (7,6) to (8,6) which is out of bounds. That would crash!

I need the loop to run only 6 times (to get from (1,6) to (7,6)), then turn and move to (7,7).

Wait, let me re-trace. After TR, LOOP(5),MOVE,END, TL, the robot is at (0,6) facing right. Then LOOP(7):

• Start at (0,6) facing right.
• Iteration 1: IF GEM (no gem at (0,6)), MOVE to (1,6)
• Iteration 2: IF GEM (no), MOVE to (2,6)
• Iteration 3: IF GEM (no), MOVE to (3,6)
• Iteration 4: IF GEM (yes! gem at (4,6)? No, we're at (3,6). No gem. MOVE to (4,6)
• Iteration 5: IF GEM (yes! gem at (4,6)), PICKUP, MOVE to (5,6)
• Iteration 6: IF GEM (no), MOVE to (6,6)
• Iteration 7: IF GEM (no), MOVE to (7,6)

After loop: at (7,6) facing right. TR (down). MOVE to (7,7). Goal!

Wait, that's 7 iterations and we end at (7,6), not (8,6). Let me recount:

• Before loop: at (0,6)
• After iter 1: at (1,6)
• After iter 2: at (2,6)
• After iter 3: at (3,6)
• After iter 4: at (4,6)
• After iter 5: at (5,6) (gem picked up at (4,6) in this iteration)
• After iter 6: at (6,6)
• After iter 7: at (7,6)

Yes! 7 iterations, ending at (7,6). Then TR (down), MOVE to (7,7). Goal!

So the solution is: TR, LOOP(5),MOVE,END, TL, LOOP(7),IF-GEM,PICKUP,IF-END,MOVE,LOOP-END, TR, MOVE = 1+1+1+1+1+1+1+1+1+1+1+1+1 = 13 blocks

That's 13 blocks! Even better than 14. But this uses conditionals, which is great for the "Master Coder" level.

Actually, wait. Let me recount:

1. TR
2. LOOP(5) - loop-start
3. MOVE
4. END - loop-end
5. TL
6. LOOP(7) - loop-start
7. IF-GEM - if-start
8. PICKUP
9. IF-END - if-end
10. MOVE
11. LOOP-END - loop-end
12. TR
13. MOVE

13 blocks! Par: 13.

But this is the "Master Coder" level which should be challenging. 13 blocks with conditionals is a good solution. Let me set par to 14 (3 stars for ≤14, which includes both the 13-block conditional solution and the 14-block loop solution).

Actually, let me set par to 13 to reward the conditional solution.

Hmm, but the player might not think of using conditionals. Let me set par to 15 to be more forgiving:

• 3 stars: ≤15 blocks
• 2 stars: ≤22 blocks
• 1 star: >22 blocks

Actually, let me set par to 14. The 13-block solution gets 3 stars, the 14-block solution also gets 3 stars, and simpler solutions get 2 or 1 stars.

OK, let me now update the level definitions in the HTML file. I need to fix:

1. Level 10 (Spiral Path) - new grid
2. Level 12 (Master Coder) - new grid and par

Let me also verify the Conditional Corner level (Level 11):

Grid: ....... R....#. .....#. ....#.. ...G... .......

R at (0,1) facing right. G at (3,4).

Row 0: . . . . . . . Row 1: R . . . . # . Row 2: . . . . . # . Row 3: . . . . # . . Row 4: . . . G . . . Row 5: . . . . . . .

Walls: (5,1), (5,2), (4,3)

Path: (0,1) → right → (1,1),(2,1),(3,1),(4,1). Wall at (5,1)='#'. Turn right (down). (4,2)='.' (row 2: '.....#.' -> (4,2)='.'). Move to (4,2). (4,3)='#' (row 3: '....#..' -> (4,3)='#'). Wall! Turn right (left). (3,2)='.'. Move to (3,2). Turn right (up). (3,1) already visited. Turn right (right). (4,2) already visited. Turn right (down). (3,3)='.' (row 3: '....#..' -> (3,3)='.'). Move to (3,3). (3,4)='G' (row 4: '...G...' -> (3,4)='G'). Move to (3,4). Goal!

Commands: MOVE x4, TR, MOVE, TR, MOVE, TR, MOVE, MOVE = 4+1+1+1+1+1+1+1 = 11 blocks

Hmm, let me re-trace more carefully: (0,1) facing right. MOVE → (1,1) MOVE → (2,1) MOVE → (3,1) MOVE → (4,1) Wall at (5,1). TR (down). MOVE → (4,2) Wall at (4,3). TR (left). MOVE → (3,2) TR (up). (3,1) visited but passable. Actually, I don't want to go up. TR (right). (4,2) visited. TR (down). MOVE → (3,3) MOVE → (3,4) = G

Wait, from (3,2) facing left: TR = up. (3,1) is passable but I don't want to go there. TR = right. (4,2) is passable but already visited. TR = down. (3,3) is passable. MOVE → (3,3).

From (3,3) facing down: MOVE → (3,4) = G. Goal!

Commands: MOVE, MOVE, MOVE, MOVE, TR, MOVE, TR, MOVE, TR, TR, MOVE, MOVE Wait, that's 12 blocks. Let me recount:

1. MOVE → (1,1)
2. MOVE → (2,1)
3. MOVE → (3,1)
4. MOVE → (4,1)
5. TR (down)
6. MOVE → (4,2)
7. TR (left) [because wall at (4,3)]
8. MOVE → (3,2)
9. TR (down) [turn from left to down = TR? No! Left + TR = up. Left + TL = down.]

Wait, I need to be more careful with turns. If facing left:

• TR (turn right) = up
• TL (turn left) = down

So from (3,2) facing left: TL (down). MOVE → (3,3). MOVE → (3,4) = G.

Commands: MOVE x4, TR, MOVE, TR, MOVE, TL, MOVE, MOVE = 4+1+1+1+1+1+1 = 10 blocks

With loops: LOOP(4),MOVE,END, TR, MOVE, TR, MOVE, TL, LOOP(2),MOVE,END = 3+1+1+1+1+3 = 10 blocks

Same! Par: 10.

Now, can we use IF WALL to solve this more elegantly?

LOOP(10), IF-WALL, TR, END, MOVE, END

Let me trace: (0,1) facing right. Iter 1: IF WALL? (1,1)='.', no. MOVE → (1,1) Iter 2: IF WALL? (2,1)='.', no. MOVE → (2,1) Iter 3: IF WALL? (3,1)='.', no. MOVE → (3,1) Iter 4: IF WALL? (4,1)='.', no. MOVE → (4,1) Iter 5: IF WALL? (5,1)='#', yes! TR (down). MOVE → (4,2) Iter 6: IF WALL? (4,3)='#', yes! TR (left). MOVE → (3,2) Iter 7: IF WALL? (2,2)='.', no. MOVE → (2,2) Iter 8: IF WALL? (1,2)='.', no. MOVE → (1,2) Iter 9: IF WALL? (0,2)='.', no. MOVE → (0,2) Iter 10: IF WALL? (-1,2) out of bounds, yes! TR (up). MOVE → (0,1)

That goes in the wrong direction! The IF WALL approach with always turning right creates a wall-following behavior, but it follows the right wall, which might not lead to the goal.

Let me try a different approach. What if we use IF WALL to turn left instead?

LOOP(10), IF-WALL, TL, END, MOVE, END

Iter 1: IF WALL? (1,1)='.', no. MOVE → (1,1) Iter 2: IF WALL? (2,1)='.', no. MOVE → (2,1) Iter 3: IF WALL? (3,1)='.', no. MOVE → (3,1) Iter 4: IF WALL? (4,1)='.', no. MOVE → (4,1) Iter 5: IF WALL? (5,1)='#', yes! TL (up). MOVE → (4,0) Iter 6: IF WALL? (4,-1) out of bounds, yes! TL (left). MOVE → (3,0) Iter 7: IF WALL? (2,0)='.', no. MOVE → (2,0) ...

This also goes in the wrong direction. The wall-following approach doesn't work well for this maze.

Let me try a hybrid approach: MOVE x4, TR, MOVE, TR, MOVE, TL, MOVE, MOVE = 10 blocks (no loops, no conditionals)

Or with a conditional: LOOP(5), IF-WALL, TR, END, MOVE, END, TR, MOVE, TR, MOVE, TL, MOVE, MOVE Let me trace: Iter 1: IF WALL? (1,1)='.', no. MOVE → (1,1) Iter 2: IF WALL? (2,1)='.', no. MOVE → (2,1) Iter 3: IF WALL? (3,1)='.', no. MOVE → (3,1) Iter 4: IF WALL? (4,1)='.', no. MOVE → (4,1) Iter 5: IF WALL? (5,1)='#', yes! TR (down). MOVE → (4,2) After loop: at (4,2) facing down. TR (left). MOVE → (3,2) TL (down). MOVE → (3,3) MOVE → (3,4) = G

Commands: LOOP(5), IF-WALL, TR, IF-END, MOVE, LOOP-END, TR, MOVE, TL, MOVE, MOVE = 1+1+1+1+1+1+1+1+1+1+1 = 11 blocks

That's 11 blocks, which is more than 10. So the conditional approach is actually worse here.

The optimal is 10 blocks without conditionals. Par: 10.

OK, so the Conditional Corner level doesn't actually benefit from conditionals. That's fine - the conditionals are available as a tool, and the player can use them if they want, but they're not required. The level name is about the concept, not that conditionals must be used.

Actually, let me redesign this level to make conditionals more useful. What if the maze has a section where the robot doesn't know exactly when it'll hit a wall?

Actually, the player can always see the entire grid, so they always know. The conditionals are more about teaching the concept. Let me keep the level as is.

OK, let me now update the HTML file with the fixed levels. I need to update:

1. Level 10 (Spiral Path) - new grid and par
2. Level 12 (Master Coder) - new grid and par

Let me also verify all the other levels are correct by running the simulation again.

Let me write the fix now.

The error is happening because the grid has undefined rows. The issue is likely that the grid rows have different lengths, causing state.grid[ny] to be undefined when ny is valid but the row doesn't have enough columns. Let me add better error handling and debug output.

Actually, looking at the error more carefully, it says Cannot read properties of undefined (reading 'NaN'). This means state.grid[ny] is undefined, which means ny is out of range. But the check ny < 0 || ny >= state.rows should catch that. Unless state.rows is wrong.

Wait, the issue might be that the grid rows have different lengths. If a row is shorter than expected, state.grid[ny][nx] would be undefined when nx is within state.cols but beyond the actual row length. But the error says state.grid[ny] is undefined, not state.grid[ny][nx].

Let me look at the error line more carefully:

The error is Cannot read properties of undefined (reading 'NaN'). This means state.grid[ny] is undefined. But we check ny >= state.rows first. Unless state.rows is incorrect.

Wait, I think the issue is that the Spiral Path grid has a space in one of the rows. I wrote ' .#####.' with a leading space. Let me check.

In my test code, I have:

Row 6 is ' .#####.' which has a leading space, making it 8 characters instead of 7. But I also have LEVELS[9].grid[6] = '.#####.'; to fix it. Let me check if that fix is applied before the test runs.

Actually, looking at the code, the fix line LEVELS[9].grid[6] = '.#####.'; is after the LEVELS definition, so it should be applied. But the error might be happening before that.

Wait, the error is at line 58 of the eval, which is the simulate function. The parseLevel function uses lv.grid[0].length for cols. If the first row is 7 chars, cols=7. But if row 6 has 8 chars (with the space), the grid array would have 8 elements for that row. The issue is that state.grid[ny] is undefined, which means ny is out of range.

Actually, I think the issue is different. Let me look at the error more carefully. The error says Cannot read properties of undefined (reading 'NaN'). The NaN suggests that nx or ny is NaN. This could happen if state.robot.dir is undefined or invalid.

Let me check: in parseLevel, robot = { x: c, y: r, dir: DIRS[lv.dir] }. If lv.dir is 'right', DIRS['right'] is 0. That should be fine.

Wait, maybe the issue is that one of the levels doesn't have an 'R' in the grid, so robot is null. Let me check all levels.

Actually, looking at the error trace, it's at line 196 which is in the forEach callback. Let me add better error handling.

Let me rewrite the test with better error handling.

Now I can see the issues:

1. Level 3 (Gem Collector): Goal is at (2,3) but the robot ends at (3,3). The grid is:

   R at (0,1), gem at (2,1), G at (2,3). The robot goes right 2, picks up gem, moves right 1 to (3,1), turns right (down), moves to (3,2), (3,3). But goal is at (2,3), not (3,3). I need to fix the solution: after picking up the gem, move right 1, turn right (down), move 2, turn left (left), move 1. Or change the grid.

   Actually, let me fix the solution. The goal is at (2,3). From (2,1) after pickup, I need to go to (2,3). That's straight down 2. So: MOVE, MOVE, PICKUP, TURN_RIGHT, MOVE, MOVE. That's 6 blocks, not 7. But par is 7. Let me adjust.

   Wait, the robot is at (2,1) after picking up the gem. It's facing right. To go to (2,3), it needs to turn right (down) and move 2. So: MOVE, MOVE, PICKUP, TURN_RIGHT, MOVE, MOVE = 6 blocks. Par should be 6.

   But I set par to 7. Let me change par to 6.

   Actually wait, let me re-examine the grid:

   R at (0,1), gem at (2,1), G at (2,3).

   Solution: MOVE (to 1,1), MOVE (to 2,1), PICKUP, TURN_RIGHT (down), MOVE (to 2,2), MOVE (to 2,3) = 6 blocks.

   Par: 6. Let me update.

2. Level 5 (Around the Wall): Goal is at (5,1) but robot ends at (4,2). The grid is:

   R at (0,1), wall at (2,1), G at (5,1).

   The robot goes: MOVE (to 1,1), TR (down), MOVE (to 1,2), TL (right), MOVE (to 2,2), MOVE (to 3,2), MOVE (to 4,2). But it needs to get back to row 1 and continue to (5,1).

   After reaching (4,2), it needs to: TL (up), MOVE (to 4,1), MOVE (to 5,1) = G. But (4,1) is '.' and (5,1) is 'G'. Wait, is there a wall at (3,1)? No, the wall is only at (2,1). So from (4,2), TL (up), MOVE (to 4,1), MOVE (to 5,1) = G.

   Full solution: MOVE, TR, MOVE, TL, MOVE, MOVE, MOVE, TL, MOVE, MOVE = 10 blocks.

   Or with a loop: MOVE, TR, MOVE, TL, LOOP(3), MOVE, END, TL, LOOP(2), MOVE, END = 3+1+1+3+1+3 = 12. Worse.

   Actually, let me reconsider. The wall is at (2,1). The robot needs to go from (0,1) to (5,1), avoiding (2,1).

   Path: right 1 to (1,1), down 1 to (1,2), right 4 to (5,2), up 1 to (5,1) = G. Commands: MOVE, TR, MOVE, TL, MOVE, MOVE, MOVE, MOVE, TL, MOVE = 10 blocks.

   Or: MOVE, TR, MOVE, TL, LOOP(4), MOVE, END, TL, MOVE = 3+1+1+3+1+1 = 10 blocks. Same!

   Par: 10. But I set it to 7. Let me change to 10.

   Wait, actually, can we do better? What about going right 1, down 1, right 4, up 1? That's 1+1+4+1 = 7 moves + 3 turns = 10 blocks. Can't do better.

   Actually, what if we go down first, then right, then up? TR (down), MOVE (to 0,2), TL (right), LOOP(5), MOVE, END (to 5,2), TL (up), MOVE (to 5,1) = G. = 1+1+1+3+1+1 = 8 blocks!

   Let me verify: (0,1) facing right. TR (down). MOVE to (0,2). TL (right). LOOP(5): MOVE to (1,2), (2,2), (3,2), (4,2), (5,2). TL (up). MOVE to (5,1) = G.

   Yes! That's 8 blocks. Par: 8.

   Can we do even better? TR, MOVE, TL, LOOP(5), MOVE, END, TL, MOVE = 1+1+1+3+1+1 = 8. That's the minimum I think.

   Actually, what about: TR, LOOP(1), MOVE, END, TL, LOOP(5), MOVE, END, TL, MOVE? That's worse.

   Or without loops: TR, MOVE, TL, MOVE, MOVE, MOVE, MOVE, MOVE, TL, MOVE = 10 blocks. With loops: TR, MOVE, TL, LOOP(5), MOVE, END, TL, MOVE = 8 blocks.

   Par: 8.

3. Level 6 (Double Gems): Goal is at (6,1) but robot ends at (5,1). The grid is:

   R at (0,1), gems at (2,1) and (5,1), G at (6,1).

   The loop solution: LOOP(2), MOVE, MOVE, PICKUP, END, MOVE. Iteration 1: MOVE to (1,1), MOVE to (2,1), PICKUP gem at (2,1). Iteration 2: MOVE to (3,1), MOVE to (4,1), PICKUP (no gem at (4,1)). After loop: MOVE to (5,1).

   The problem is the second gem is at (5,1), not (4,1). The pattern is: gem at positions 2 and 5, which are 3 apart, not 2. So the loop MOVE, MOVE, PICKUP doesn't work because the gems are 3 apart.

   Let me fix the grid to have gems 3 apart: gems at (2,1) and (5,1) are 3 apart. The loop should be MOVE, MOVE, MOVE, PICKUP repeated... but that's 4 commands per iteration.

   Actually, let me change the gem positions to be 2 apart: gems at (2,1) and (4,1), G at (6,1). Grid: "R...G" = 7 chars.

   Then LOOP(2), MOVE, MOVE, PICKUP, END, MOVE, MOVE: Iter 1: MOVE to (1,1), MOVE to (2,1), PICKUP gem. Iter 2: MOVE to (3,1), MOVE to (4,1), PICKUP gem. After loop: MOVE to (5,1), MOVE to (6,1) = G. = 3+1+1+1+1+1 = 8 blocks. Hmm, that's more.

   Or: LOOP(2), MOVE, MOVE, PICKUP, END, LOOP(2), MOVE, END = 3+3 = 6 blocks. Iter 1: MOVE to (1,1), MOVE to (2,1), PICKUP. Iter 2: MOVE to (3,1), MOVE to (4,1), PICKUP. After loop: LOOP(2), MOVE to (5,1), MOVE to (6,1) = G. = 3+3 = 6 blocks. Par: 6. ✓

   Let me change the grid to "R...G".

4. Level 8 (The Detour): Goal is at (5,1) but robot ends at (6,1). The grid is:

   R at (0,1), walls at (2,1),(3,1),(4,1), G at (5,1).

   The robot goes: MOVE (to 1,1), TR (down), MOVE (to 1,2), TL (right), LOOP(5) MOVE (to 2,2,3,2,4,2,5,2,6,2), TL (up), MOVE (to 6,1). But goal is at (5,1), not (6,1).

   The issue is the loop goes 5 moves right from (1,2), ending at (6,2). Then TL (up) to (6,1). But goal is at (5,1).

   I need to go only 4 moves right to (5,2), then up to (5,1).

   Solution: MOVE, TR, MOVE, TL, LOOP(4), MOVE, END, TL, MOVE = 1+1+1+1+3+1+1 = 9 blocks.

   Let me verify: (0,1) right. MOVE to (1,1). TR (down). MOVE to (1,2). TL (right). LOOP(4): MOVE to (2,2), (3,2), (4,2), (5,2). TL (up). MOVE to (5,1) = G.

   Yes! 9 blocks. Par: 9. ✓

5. Level 9 (Gem Loop): Goal is at (7,1) but robot ends at (4,1). The grid is:

   R at (0,1), gems at (2,1),(4,1),(6,1), G at (7,1).

   The loop solution: LOOP(3), MOVE, PICKUP, END, MOVE. Iter 1: MOVE to (1,1), PICKUP (no gem). Iter 2: MOVE to (2,1), PICKUP gem. Iter 3: MOVE to (3,1), PICKUP (no gem). After loop: MOVE to (4,1).

   The problem is the gems are at positions 2, 4, 6 (every other position starting from 2). The pattern MOVE, PICKUP doesn't work because the robot starts at (0,1) and the first gem is at (2,1), which is 2 moves away.

   I need to first move to (1,1), then loop: MOVE, PICKUP. But that would be: MOVE, LOOP(3), MOVE, PICKUP, END, MOVE. Iter 1: MOVE to (2,1), PICKUP gem. Iter 2: MOVE to (3,1), PICKUP (no gem). Iter 3: MOVE to (4,1), PICKUP gem. After loop: MOVE to (5,1).

   Still doesn't work because gems are at 2, 4, 6 (every 2 positions), but the loop does MOVE, PICKUP which advances 1 per iteration.

   I need the loop to do MOVE, MOVE, PICKUP: MOVE, LOOP(3), MOVE, MOVE, PICKUP, END. Iter 1: MOVE to (2,1), MOVE to (3,1), PICKUP (no gem at 3,1).

   That doesn't work either. The gems are at 2, 4, 6. The robot starts at 0. To reach gem at 2, it needs 2 moves. Then to reach gem at 4, it needs 2 more moves. Then to reach gem at 6, 2 more moves. Then to reach G at 7, 1 more move.

   So the pattern is: MOVE, MOVE, PICKUP (repeat 3 times), then MOVE. = LOOP(3), MOVE, MOVE, PICKUP, END, MOVE = 3+1+1 = 5... wait: LOOP(3), MOVE, MOVE, PICKUP, END, MOVE = 1 (loop-start) + 3 (body: move, move, pickup) + 1 (loop-end) + 1 (move) = 6 blocks.

   Iter 1: MOVE to (1,1), MOVE to (2,1), PICKUP gem. Iter 2: MOVE to (3,1), MOVE to (4,1), PICKUP gem. Iter 3: MOVE to (5,1), MOVE to (6,1), PICKUP gem. After loop: MOVE to (7,1) = G.

   Yes! 6 blocks. But I set par to 5. Let me change to 6.

   Actually, can we do better? What about using IF GEM? LOOP(7), MOVE, IF-GEM, PICKUP, IF-END, END = 1+1+1+1+1+1 = 6 blocks.

   Iter 1: MOVE to (1,1), IF GEM (no), Iter 2: MOVE to (2,1), IF GEM (yes), PICKUP Iter 3: MOVE to (3,1), IF GEM (no) Iter 4: MOVE to (4,1), IF GEM (yes), PICKUP Iter 5: MOVE to (5,1), IF GEM (no) Iter 6: MOVE to (6,1), IF GEM (yes), PICKUP Iter 7: MOVE to (7,1) = G

   6 blocks. Same.

   Or: LOOP(7), IF-GEM, PICKUP, IF-END, MOVE, END = 6 blocks. Iter 1: IF GEM (no at 0,1), MOVE to (1,1) Iter 2: IF GEM (no at 1,1), MOVE to (2,1) Iter 3: IF GEM (yes at 2,1), PICKUP, MOVE to (3,1) Iter 4: IF GEM (no at 3,1), MOVE to (4,1) Iter 5: IF GEM (yes at 4,1), PICKUP, MOVE to (5,1) Iter 6: IF GEM (no at 5,1), MOVE to (6,1) Iter 7: IF GEM (yes at 6,1), PICKUP, MOVE to (7,1) = G

   6 blocks. Same.

   Par: 6. Let me update.

6. Level 10 (Spiral Path): The robot hits a wall at (2,2) when trying to go up from (2,3). The grid is:

   Row 2: . # # # # # . -> (0,2)='.', (1,2)='#', (2,2)='#', (3,2)='#', (4,2)='#', (5,2)='#', (6,2)='.'

   So (2,2) is a wall. The robot at (2,3) facing up tries to move to (2,2) which is a wall.

   The path I designed was: right 6, down 2, left 4, down 2, right 1. But the "down 2" from (2,3) goes to (2,4) and (2,5). Let me re-trace:

   After left 4, robot is at (2,3) facing left. Then TR (up). But (2,2) is a wall!

   I need to turn left (down) instead of right (up) from (2,3) facing left.

   Wait, let me re-examine. From (2,3) facing left:

   • TR = up → (2,2) = wall!
   • TL = down → (2,4) = '.' (row 4: '.#.#.##' -> (2,4)='.')

   So I should TL (down), not TR (up).

   Corrected path: right 6, TR (down), down 2, TR (left), left 4, TL (down), down 2, TL (right), right 1.

   Wait, from (2,3) facing left, TL = down. MOVE to (2,4). MOVE to (2,5). From (2,5) facing down, TL = right. MOVE to (3,5) = G.

   Commands: MOVE x6, TR, MOVE x2, TR, MOVE x4, TL, MOVE x2, TL, MOVE = 6+1+2+1+4+1+2+1+1 = 19 blocks without loops

   With loops: LOOP(6),MOVE,END, TR, LOOP(2),MOVE,END, TR, LOOP(4),MOVE,END, TL, LOOP(2),MOVE,END, TL, MOVE = 3+1+3+1+3+1+3+1+1 = 17 blocks

   Par: 17. But I set it to 15. Let me check if there's a shorter path.

   Actually, let me reconsider the grid. Maybe I should redesign it to have a shorter path.

   Let me try a different spiral design:

   Wait, I already tried this and the inner corridor is enclosed. Let me add an opening.

   Actually, let me just fix the solution for the current grid and set par to 17.

   Or better, let me redesign the grid to have a shorter path. Let me make a simpler spiral:

   R at (0,1) right. G at (2,4).

   Row 0: . . . . . . . Row 1: R . . . . . . Row 2: . # # # # . . Row 3: . # . . # . . Row 4: . # G . # . . Row 5: . # # # # . . Row 6: . . . . . . .

   Path: right 6 to (6,1), TR (down), down 4 to (6,5)... wait, (6,2)='.' (row 2: '.####..' -> (6,2)='.'). (6,3)='.' (row 3: '.#..#..' -> (6,3)='.'). (6,4)='.' (row 4: '.#G.#..' -> (6,4)='.'). (6,5)='.' (row 5: '.####..' -> (6,5)='.').

   From (6,5) facing down: TR (left). (5,5)='.' (row 5: '.####..' -> (5,5)='.'). Wait, row 5 is '.####..' -> (0,5)='.', (1,5)='#', (2,5)='#', (3,5)='#', (4,5)='#', (5,5)='.', (6,5)='.'.

   So from (6,5) TR (left): MOVE to (5,5). MOVE to (4,5)? (4,5)='#'. Wall!

   Hmm. Let me try going left from (6,4): from (6,4) TR (left). (5,4)='.' (row 4: '.#G.#..' -> (5,4)='#'). Wall!

   Row 4: '.#G.#..' -> (0,4)='.', (1,4)='#', (2,4)='G', (3,4)='.', (4,4)='#', (5,4)='.', (6,4)='.'

   Wait, (5,4)='.'. Let me re-read: '.#G.#..' Position 0: '.' Position 1: '#' Position 2: 'G' Position 3: '.' Position 4: '#' Position 5: '.' Position 6: '.'

   So (5,4)='.'. From (6,4) TR (left): MOVE to (5,4). MOVE to (4,4)='#'. Wall!

   From (5,4) TR (up): (5,3)='.' (row 3: '.#..#..' -> (5,3)='.'). MOVE to (5,3). From (5,3) TR (left): (4,3)='#' (row 3: '.#..#..' -> (4,3)='#'). Wall! From (5,3) TL (down): (5,4) already visited. From (5,3) TR (right): (6,3) already visited. From (5,3) TL (up): (5,2)='.' (row 2: '.####..' -> (5,2)='.'). MOVE to (5,2). From (5,2) TL (left): (4,2)='#'. Wall! From (5,2) TR (down): already visited. From (5,2) TR (right): (6,2) already visited. From (5,2) TL (up): (5,1)='.' (row 1: 'R......' -> (5,1)='.'). MOVE to (5,1).

   This is getting very complicated. Let me just use a simpler maze design.

   Actually, let me just fix the current Spiral Path grid by making the path work. The issue was that from (2,3) facing left, I should turn left (down) instead of right (up).

   Let me update the solution and par: Solution: MOVE x6, TR, MOVE x2, TR, MOVE x4, TL, MOVE x2, TL, MOVE = 19 blocks With loops: 17 blocks Par: 17

   Actually, let me simplify the spiral to make it shorter. Let me use a 5x5 grid:

   Wait, that's not really a spiral. Let me think...

   Actually, let me just use a simpler maze for level 10 and keep the spiral concept:

   Hmm, this is getting too complicated. Let me just use a clean, simple maze:

   Actually, I'm spending too much time on this. Let me just fix the solution for the current grid and set the correct par. The grid is fine, I just had the wrong solution.

   Current grid:

   Correct solution: MOVE x6, TR, MOVE x2, TR, MOVE x4, TL, MOVE x2, TL, MOVE = 19 blocks With loops: LOOP(6),MOVE,END, TR, LOOP(2),MOVE,END, TR, LOOP(4),MOVE,END, TL, LOOP(2),MOVE,END, TL, MOVE = 17 blocks

   Par: 17.

   Actually, let me see if there's a shorter path. What if the robot goes down the left side first?

   (0,1) → TR (down) → (0,2) → (0,3) → (0,4) → (0,5) → (0,6) → TL (right) → (1,6)='#' (row 6: '.#####.' -> (1,6)='#'). Wall!

   Dead end. So the left side doesn't work.

   What about going down to (0,3) then right? (0,1) → TR (down) → (0,2) → (0,3) → TL (right) → (1,3)='#' (row 3: '.#.....' -> (1,3)='#'). Wall!

   Also dead end. The only way is through the right side.

   OK, par: 17. Let me update.

Now let me also fix the grid for Level 6 (Double Gems). I need to change the gem positions to be 2 apart: Current: "R...G" (gems at 2 and 5, 3 apart) New: "R...G" (gems at 2 and 4, 2 apart)

And fix the pars:

• Level 3: par 6 (was 7)
• Level 5: par 8 (was 7)
• Level 6: par 6 (was 6, but need to fix grid)
• Level 8: par 9 (was 9, but need to fix solution)
• Level 9: par 6 (was 5)
• Level 10: par 17 (was 15)

Let me now update the HTML file with all these fixes.