2048 · muse-ember
Output generated Cost / run $0.0152 Runtime 43.7s
Prompt for this run
Build a playable 2048 game using HTML elements and CSS with a 4 by 4 board. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Arrow keys slide tiles toward the selected edge. Adjacent equal tiles merge once per tile per move, and the score increases by the value of each new merged tile. - For example, moving [2, 2, 2, 2] left produces [4, 4, 0, 0], not [8, 0, 0, 0]. Moving [2, 2, 4, 0] left produces [4, 4, 0, 0]. These examples describe the move before spawning a new tile. - Start with two tiles. After a move that changes the board, spawn exactly one tile in an empty cell: 2 with 90% probability, otherwise 4. Do not spawn after an unchanged move. - Animate movement and merging without allowing rapid input to corrupt board state. Prevent arrow keys from scrolling the page. - Show score, a win message on reaching 2048, and Game Over only when no valid move remains. Provide New Game to reset board and score; allow continuing after a win. Verify: Play a short sequence of arrow-key moves and check that tiles slide, a valid move adds a tile, and any observed merge updates the score by its merged value. Use New Game and check that the board returns to two tiles with a reset score.
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
METRICS
Transcript · 27 messages
Build a playable 2048 game using HTML elements and CSS with a 4 by 4 board. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Arrow keys slide tiles toward the selected edge. Adjacent equal tiles merge once per tile per move, and the score increases by the value of each new merged tile. - For example, moving [2, 2, 2, 2] left produces [4, 4, 0, 0], not [8, 0, 0, 0]. Moving [2, 2, 4, 0] left produces [4, 4, 0, 0]. These examples describe the move before spawning a new tile. - Start with two tiles. After a move that changes the board, spawn exactly one tile in an empty cell: 2 with 90% probability, otherwise 4. Do not spawn after an unchanged move. - Animate movement and merging without allowing rapid input to corrupt board state. Prevent arrow keys from scrolling the page. - Show score, a win message on reaching 2048, and Game Over only when no valid move remains. Provide New Game to reset board and score; allow continuing after a win. Verify: Play a short sequence of arrow-key moves and check that tiles slide, a valid move adds a tile, and any observed merge updates the score by its merged value. Use New Game and check that the board returns to two tiles with a reset score.
thinking
Designing a single-file 2048 implementation with grid rendering, input handling, animation state, and game logic constraints.Detailing tile animation timing, merge handling, and win or game-over state checks.
index.html (13612 bytes)Successfully wrote to index.html
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{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"2048\nSCORE\n0\nBEST\n0\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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Debugging CSS layout where tile width calculation depends on container size but tiles render unexpectedly small due to missing height context.
{"action":"motion"}Frame 1, +0ms
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Frame 2, +524ms
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Frame 3, +1044ms
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Frame 4, +1566ms
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{"console":[],"dom":"2048\nSCORE\n0\nBEST\n0\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"key","text":"ArrowLeft"}Frame 1, +0ms
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{"console":[],"dom":"2048\nSCORE\n0\nBEST\n0\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"2048\nSCORE\n0\nBEST\n0\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"key","text":"ArrowUp"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"2048\nSCORE\n0\nBEST\n0\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"2048\nSCORE\n4\nBEST\n4\n\nJoin the tiles, get to 2048!\n\nNew Game\n4\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"click","toX":785,"toY":145}Frame 1, +0ms
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{"console":[],"dom":"2048\nSCORE\n4\nBEST\n4\n\nJoin the tiles, get to 2048!\n\nNew Game\n4\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"click","toX":785,"toY":117}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"2048\nSCORE\n4\nBEST\n4\n\nJoin the tiles, get to 2048!\n\nNew Game\n4\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"click","x":785,"y":117}Frame 1, +0ms
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{"console":[],"dom":"2048\nSCORE\n0\nBEST\n4\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"2048\nSCORE\n0\nBEST\n4\n\nJoin the tiles, get to 2048!\n\nNew Game\n2\n2\n↑\n←\n↓\n→\n\n← ↑ ↓ → or swipe to move tiles.\nArrow keys won't scroll the page.","images":"attached"}
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{"command":"ls -lh index.html && wc -c index.html"}-rw-r--r-- 1 node node 14K Nov 10 01:05 index.html 13628 index.html
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Created **index.html** — a fully self-contained, playable 2048 game (inline CSS/JS, no external assets/CDNs). **Implemented:** - 4×4 board with HTML/CSS tiles, classic 2048 colors, score & best display - Arrow keys (preventDefault to stop scrolling), on-screen D-pad, and swipe support - Correct merge-once logic (e.g., `[2,2,2,2]→[4,4,0,0]`), score increases by merged values, animated slide/spawn/merge with input lock during animation - Starts with 2 tiles; exactly one spawn (90% 2 / 10% 4) after a changed move only - Win overlay at 2048 with “Keep Going”, Game Over only when no empty cell and no adjacent equal tiles, and New Game reset **Verified in browser:** - Initial load: 2 tiles, score 0, no console errors - `ArrowLeft`: tiles slid left and one new tile spawned (2→3 tiles) - `ArrowUp`: two 2s merged into a 4, score/best updated to 4 (spawned tile also appeared, correctly) - New Game click: score reset to 0 and board returned to exactly 2 tiles **Not played through in-browser:** reaching 2048 (win/continue overlay) and full-board Game Over — logic is implemented and code-reviewed, but would require a long play session / forced board state to observe.