2048 · qwen3.5-9b
Output generated Cost / run $0.0017 Runtime 62.6s
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 · 7 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
I need to build a complete 2048 game in a single HTML file with inline CSS and JavaScript. Let me break down the requirements:
1. 4x4 board using HTML elements
2. Arrow keys for movement (slide tiles toward selected edge)
3. Merge logic: adjacent equal tiles merge once per tile per move
4. Score increases by the value of each merged tile
5. Start with two tiles (2 with 90% probability, 4 with 10%)
6. Spawn one tile after a move that changes the board
7. Don't spawn after an unchanged move
8. Animate movement and merging
9. Prevent arrow keys from scrolling the page
10. Show score
11. Win message on reaching 2048
12. Game Over only when no valid move remains
13. New Game to reset board and score
14. Allow continuing after a win
Let me write the complete game:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>2048 Game</title>
<style>
/* CSS styles */
</style>
</head>
<body>
<!-- HTML structure -->
<script>
// JavaScript game logic
</script>
</body>
</html>
```
Let me write the complete implementation:
index.html (17943 bytes)Successfully wrote to index.html
thinking
Now let me run the application in the browser to inspect it and verify the functionality.
Now let me run the application in the browser to verify it works correctly:
{"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\nScore\n0\nNew Game\n2\n2\n\nUse ↑ ↓ ← → to move tiles","images":"attached"}
thinking
The initial render looks good - the game board is displayed with the title "2048", score of 0, and a "New Game" button. The board shows two tiles with value 2, which is correct for the initial state. Now I need to test the actual gameplay mechanics: 1. Arrow key movement (slide tiles) 2. Merging of equal tiles 3. Score updates 4. Tile spawning after moves 5. Win condition (2048) 6. Game Over condition 7. New Game reset Let me test these by running some commands to interact with the game.
The initial render looks good - the game board is displayed with the title "2048", score of 0, and a "New Game" button. The board shows two tiles with value 2, which is correct for the initial state. Now let me test the actual gameplay mechanics by running some commands to interact with the game: <tool_call> bash # Test the game by running some key presses and checking the state echo "Testing game mechanics..." </bash>