Implement game state guards and add game to index

Let me research what games already exist to avoid duplication, and then brainstorm a fresh game concept.

Now I have a clear picture of all 69 existing games. Let me brainstorm something truly unique. Looking at the existing collection, I notice there's no rhythm-based typing game, no ecosystem simulation, no nonogram/picross-style... wait, picross-quest exists. Let me think about what's missing:

• No farming/agriculture game
• No paper folding/origami game
• No light refraction/prism direction game (prism exists but let me check)
• No bowling/pool/billiards game
• No card battle/CCG (dungeon-deck is close)
• No weather control game
• No pipe/plumbing game
• No conveyor belt/factory game
• No tetris-style falling block game (block-cascade might be)
• No minimap/radar navigation game
• No domino game
• No fishing game
• No archery/darts game
• No coin pusher game
• No word ladder game

Let me create a "Prism Cascade" — no, let me go with something really fresh: a conveyor belt sorting factory game called "Sort Factory" where players route items on conveyor belts to sort them into correct bins. This combines spatial reasoning, quick decision-making, and factory automation — a genre not yet represented.

Actually, let me think bigger. Let me create a "Lumen Garden" — a game about growing plants with light. No, let me go with something more action-oriented and fun.

Let me create "Ricochet" — a game where you aim and bounce a projectile off walls to hit targets, combining physics, geometry, and puzzle-solving. This is a unique angle/shooting puzzle that doesn't exist in the collection.

Actually, let me go with something even more distinctive: "Terraform" — a game where you reshape a planet's terrain by raising/lowering land to guide water flow and grow civilization. This combines simulation, puzzle, and creativity.

Let me settle on a concept that's fresh, fun, and technically interesting: "Conveyor" — a factory sorting puzzle game where you place conveyor belts and sorters to route falling items to their correct bins before they pile up. This is a unique genre (factory automation) not in the collection, mechanically engaging, and visually interesting.

Let me build it.

Now let me build the game. I'll create a polished, feature-rich factory sorting puzzle game with a unique industrial aesthetic.

The file is too large for a single write. Let me build it in parts using shell commands.

The heredoc approach is hitting JSON string limits. Let me write the JavaScript portion to a separate file first, then combine.

Now let me combine all parts into the final HTML file:

Now let me verify the file structure and fix any syntax issues:

Good, structure looks correct. Now let me check for JavaScript syntax errors:

I see the issue - there's a trailing comma after the last array element in the level definitions. Let me also check the exact error location more carefully:

********************************************************************************************************************************************************or:

******************************************************************************************************************************************************************************************************************rn:

************************************************************************************************************************************ue:

******************************************************************it:

********************************************************************************************ne:

Now let me re-check the syntax:

**************************************************************************************************ts:

************************************************************************************************************************************************************es:

All balanced. Now let me do a quick test to make sure the game logic is sound by reviewing a few key areas. Let me also review the item movement logic more carefully - there's a potential issue with how items move between cells:

I see a potential issue with the item movement logic. When an item is on a spawner tile, it should move down. But the spawner tile is at y=0, and the item starts at the spawner position. The item needs to move from the spawner onto a belt below it. Let me also check that the spawner doesn't block items from leaving - the item checks grid[this.gy][this.gx] which would be T.SPAWNER, and the code handles that with this.dir = 'down'. That should work.

However, there's a subtle issue: when an item is on a spawner and moves down, it enters the next cell. If that cell is empty, the item dies. The player needs to place a belt below the spawner. That's the intended gameplay.

Let me also check that the findBestDirection function works correctly for splitters - it should find the nearest matching bin and return a direction. But there's a potential issue: the splitter sends items in a direction, but if there's no belt in that direction, the item will fall off. The splitter should ideally send items toward a direction where there's a path. But for now, the simple approach works - the player needs to place belts leading away from the splitter.

Let me now also verify the level 8 setup which has multiple spawners at the same position:

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*****************************************************************************on:

Level 10 has multiple spawners at the same position (2,0), (4,0), and (6,0). The alt: true flag means the spawner will spawn multiple colors. But since they're at the same grid position, only the last one's type will be stored in the grid. However, the loadLevel function creates multiple Spawner objects for each fixed entry with type SPAWNER, so multiple spawners will exist at the same position, each spawning items. This is actually fine - the grid just stores T.SPAWNER, and multiple Spawner objects will spawn items at the same location.

But wait - the alt flag in the Spawner constructor adds colors from LEVELS[currentLevel].colors[1] and colors[2]. Let me check if this logic is correct:

I see a problem with the multi-color spawner logic. When alt: true, it adds LEVELS[currentLevel].colors[1] which is a fixed index. But the spawner's own color might be different. For example, in level 10, the spawner at (2,0) has color 'red' and alt:true, so it would add colors[1] which is 'blue'. That's correct. But the spawner at (6,0) has color 'red' and alt:true, so it would also add 'blue'. That's not ideal - it should probably add a different color.

Actually, looking at this more carefully, the alt flag approach is a bit confusing. Let me simplify the level definitions to just have separate spawners at different positions, each spawning a single color. This is cleaner and avoids confusion:

I see the sed replacement went wrong - it replaced too many lines and left a stale line. Let me fix this properly:

I see the indentation is off. Let me fix the indentation of the spawner lines:

The sed didn't work because the lines have different leading whitespace. Let me use a different approach:

********************************************************************************ly:

********************************************************************************id:

**************************************************************************************************ck:

*********************************************************************************************************************************************************ck:

Now let me verify syntax again:

****************************************************************************************************************ct:

These levels have multiple spawners at the same position with alt: true. The issue is that the Spawner constructor adds LEVELS[currentLevel].colors[1] when alt is true. For level 3, the spawner at (4,0) with color 'red' will spawn 'red', and the one with color 'blue' and alt:true will spawn 'blue' and 'red' (from colors[1]). So it would spawn blue and red from the second spawner, and red from the first. That's 3 colors spawning from 2 spawners, but the level only has 2 colors (red and blue). The second spawner would spawn blue and then red (from colors[1] which is 'blue'), which is wrong.

Actually wait - let me re-read the constructor. this.colors = [color] starts with the spawner's own color. Then if (alt) this.colors.push(LEVELS[currentLevel].colors[1] || color). So for the blue spawner with alt:true in level 3, colors[1] is 'blue', so it would push 'blue' again. So it would spawn ['blue', 'blue']. That's redundant.

The alt approach is confusing and buggy. Let me simplify: just have separate spawners at different positions, each with a single color. This is cleaner:

************************************************************************************************************************************************************ax:

Now let me also check the other levels for any issues. Let me look at all level definitions:

************************************************************************************************************at:

Wait, the sed commands might have affected other levels too. Let me check:

**************************************************************************************************************************************************************************************************************************************************ly:

***********************************************************************************************************************************************************************************************************************************************************ls:

****************************************************************************************on:

Syntax is valid. Now let me verify the levels look correct:

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I see - there's a duplicate "class Spawner" line. Let me fix this:

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******************************************************************ix:

The indentation is off. Let me just rewrite the whole Spawner class section properly:

****************************************************************************************2`:

Now let me verify the full syntax one more time and check the overall file:

************************************************************************************************ed:

************************************************************************************es:

*******************************************************************gs:

***********************************************le:

Good. Now let me check the T (tile types) enum:

*****************************************ng:

Good. Now let me check the audio functions:

Good. Now let me check the HTML structure to make sure all the overlays and buttons exist:

Good. Now let me check the event listeners:

Good. Now let me check the game loop and update functions:

Good. Now let me check the item movement logic:

I see a potential issue - the item movement uses this.px and this.py as absolute pixel positions, but the grid coordinates are computed from Math.floor(this.px / CELL). This means the item's pixel position is relative to the grid origin (0,0), not the canvas. Let me check the spawnItem function:

I see a potential issue. The item's px and py are set to gx * CELL + CELL/2, which is the center of the cell. But when computing the grid position from pixel position, it uses Math.floor(this.px / CELL). If px = gx * CELL + CELL/2, then Math.floor(px / CELL) = gx (since CELL/2 < CELL). This should work correctly.

But there's a subtle issue: when the item moves, px changes continuously, and the grid position is recomputed. The item needs to be on a belt tile to move. Let me check if the item starts on a spawner tile and if the spawner tile is in the grid:

Good - spawners are placed in the grid as T.SPAWNER. When an item is spawned, it starts on the spawner tile. The item update code checks for T.SPAWNER and sets direction to 'down'. This should work.

But there's a potential issue: the item starts at the center of the spawner cell, and when it moves down, it will enter the cell below. If there's no belt there, the item will die. The player needs to place a belt below the spawner. This is by design.

Let me now check the game loop and make sure everything is wired up:

Good. Now let me check the render function to make sure it draws everything:

I notice the spawner draw function is called with s.x * CELL + CELL/2, s.y * CELL + CELL/2 but the Spawner's draw method uses ctx.translate(cx, cy) which should be relative to the grid origin. But the render function applies ctx.save() and then draws - the grid is drawn at GRID_X, GRID_Y offset. Let me check:

I see - GRID_X and GRID_Y are both 0, so the grid is drawn at the canvas origin. The spawner draw is called with s.x * CELL + CELL/2, s.y * CELL + CELL/2 which is correct. The item draw uses this.px + GRID_X, this.py + GRID_Y which is also correct since GRID_X=0.

Now let me check the resizeCanvas function:

Good. Now let me check the click handler for placing belts:

**************************************************************pe:

Good. Now let me check the keyboard handler:

Good. Now let me check the level data to make sure it's well-formed:

**********************************ES:

Good. Now let me check the drawTile function for bins:

Good. Now let me check the drawBin function:

*********************************************************************************ck:

************************************************************************************************************************************************************************ss:

**********************************************************************************************************************************************************************************************************ed:

*************************************************************************************************************************************************************************************************************************************k`:

Good. Now let me check the win/lose conditions:

Good. Now let me check the startGame function:

Good. Now let me check the loadLevel function more fully:

Good. Now let me check the CSS for the game:

Good. Now let me check the HTML body structure:

Good. Now let me check the constants and tile definitions:

Good. Now let me check the remaining level data and the end of the file:

***************************************************************************************************************ck:

*********************************************************************************ly:

I see a critical bug! The gameOver function is declared twice:

Wait, let me check more carefully:

*************************************************************************************************************************************************************************************************************************************d):

handleGridClick is defined but never called - it's dead code. That's fine, it doesn't cause errors.

Now let me check the item movement logic more carefully. The item starts at the spawner position and moves in the 'down' direction. But the spawner tile is T.SPAWNER which is not a belt, so the item's direction stays 'down'. When it moves to the next cell, if that cell is empty, the item dies. If it's a belt, the direction changes. This seems correct.

But there's a potential issue: when an item is on a T.SPAWNER tile, the code sets this.dir = 'down'. But what if the spawner is not at the top? The item would still move down. This is fine for the current levels since all spawners are at the top.

Let me also check if there's an issue with items spawning on top of each other:

There's no collision detection between items. This means items can overlap on the same belt. This is actually a common design choice in conveyor games - items just stack. It's fine.

Now let me check the timer - the game over from timer doesn't check if the player has already won:

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The update function is only called when gameState === 'playing' (checked in the game loop). Once winLevel() sets gameState = 'won', the update function won't be called anymore. So the timer won't cause a game over after winning. Good.

But there's still a potential issue: if gameOver() is called from loseLife() (when lives reach 0), it sets gameState = 'lost'. Then the update function won't be called again. But the timer check happens after the items update, so if an item causes loseLife() → gameOver(), the timer check would still run in the same frame. Let me check:

If loseLife() calls gameOver() (setting gameState = 'lost'), the timer check still runs in the same frame. If the timer has also expired, gameOver() would be called again. This is not a big problem since gameOver() is idempotent (it just sets the same state and shows the same screen), but it would play the lose sound twice. Let me add a guard:

I see - the indentation uses 4 spaces, not 2. Let me use the exact text:

****************************************************************************************ls:

The indentation is off. Let me fix it:

Hmm, the sed didn't work. Let me try a different approach:

I see - the file uses 2-space indentation, not 4-space. The sed output was misleading because it was showing the content with extra leading spaces from the sed -n output format. The actual file has 2-space indentation. The guard line has 2 spaces, and gameState = 'lost' has 4 spaces. Let me fix this:

*****************************************)`:

***************************************************************************************************************************************************ly:

******************************************************************************it:

***************************************************************************************************************************************************************************er:

****************************************************************************************************************************************************************************rd:

*********************************************ss:

The Spawner class looks fine. Now let me verify the overall file is valid by checking the HTML structure:

Good. Now let me check the master index to make sure this game is listed:

The game is not in the master index! Let me check the current index:

The index is very long. Let me check if conveyor-sort is already there:

The game is not in the index. I need to add it. Let me find a good place to insert it - I'll add it after the last game card:

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Now let me do a final validation of the game file to make sure everything is correct:

All braces, parentheses, and brackets are balanced. Let me also verify the key functions are properly defined:

All the guards are in place. Let me verify the game is accessible:

******************************************************************************************************************ts: