2048 · muse-wonder
Output generated Cost / run $0.5751 Runtime 90.5s
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.
RUN
METRICS
Transcript · 25 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
Implementing 2048 game logic with DOM tile animation, input handling, and state validation for moves and win conditions.Designing tile identity tracking and input locking to prevent state corruption during animations.
index.html (15786 bytes)Successfully wrote to index.html
thinking
Analyzing 2048 tile merge logic edge cases and identifying a placement index bug after merges.
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\nBEST\n0\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
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{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\nBEST\n0\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
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{"action":"key","text":"ArrowLeft"}Frame 1, +1ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\nBEST\n0\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
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{"action":"key","text":"ArrowDown"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n4\n+4\nBEST\n4\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n4\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
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{"action":"click","x":780,"y":140}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\n+4\nBEST\n4\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
thinking
Analyzing 2048 UI behavior for new game reset, tile animation timing, rapid input handling, and pending timeout edge case.
{"path":"index.html","edits":[{"oldText":" var nextId=1, tiles=[], score=0, best=0, animating=false, won=false, keepPlaying=false, gameOverSuccessfully replaced 4 block(s) in index.html.
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\nBEST\n0\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
thinking
{"action":"key","text":"ArrowRight"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\nBEST\n0\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
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{"action":"screenshot"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"2048\n\nJoin the numbers and get to the 2048 tile!\n\nSCORE\n0\nBEST\n0\n\nUse your arrow keys to move the tiles. Equal tiles merge into one!\n\nNew Game\n2\n2\n2\n\nHow to play: Press ← ↑ → ↓ (or swipe / use the pad). Tiles slide to the edge; two equal tiles merge once per move — e.g. 2 2 2 2 → 4 4. A new tile (mostly a 2) appears after every move that changes the board.\n\nNew game started.","images":"attached"}
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{"command":"ls -l index.html && grep -c \"http://\\|https://\\|src=\" index.html || true"}-rw-r--r-- 1 node node 15926 Oct 15 04:07 index.html 0
thinking
Built a complete, playable 2048 game in a single self-contained `index.html` (inline CSS/JS, no external resources). **Features implemented:** - 4×4 HTML/CSS board with animated tile sliding (CSS transforms), merge pop and new-tile appear animations; input is locked during the 130 ms animation (plus a reset-guard token) so rapid keys / mid-animation New Game cannot corrupt state, and arrow keys are `preventDefault`-ed so the page doesn't scroll. - Correct merge rules — each tile merges at most once per move (`[2,2,2,2] → [4,4]`, `[2,2,4] → [4,4]`), score increases by each merged tile's value with a floating `+N` indicator, plus a Best score. - Starts with two tiles; after any board-changing move exactly one tile spawns in a random empty cell (90% 2 / 10% 4); unchanged moves spawn nothing. - Win overlay on reaching 2048 with "Keep playing" to continue, Game Over overlay only when the board is full with no adjacent equal tiles, and New Game (header + overlay buttons) resets board and score. Swipe/mouse-drag and an on-screen D-pad are included as extras. **Verified in the browser:** - Initial board renders with exactly two `2` tiles and score 0. - Arrow-key sequence: tiles slid to the edge, a valid move added exactly one tile (2 → 3 tiles), a `2+2` merge produced a `4` and raised the score 0 → 4 (`+4` shown, Best updated). - New Game returned the board to two tiles with score reset to 0. - No console errors (only the sandbox iframe warning from the test harness). **Not directly verified in live play:** reaching the 2048 win overlay and a natural full-board Game Over (both would require a very long game — the logic checks merged-value 2048 and `empty-or-adjacent-equal` after each settled move), the exact 90/10 spawn ratio (statistical), and the `[2,2,2,2]` example as a set-up position — though the observed single merge and the once-per-tile merge guard follow the same code path.