Asteroids · gpt-5.6-terra
Output generated Cost / run $0.0617 Runtime 69.0s
Prompt for this run
Build a playable Asteroids-style game on a canvas using procedural vector graphics. 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: - Use Left/Right to rotate the ship, Up to thrust, and Space to fire. Show the controls. The ship retains momentum and wraps around every screen edge; asteroids also wrap. - Spawn moving large asteroids. A bullet hit splits a large asteroid into smaller pieces; hitting a smallest piece removes it. Hits increase the score. - Start with three lives. A ship-asteroid collision removes one life, respawns the ship, and briefly protects it from immediate repeated damage. - Clearing all asteroids starts another wave. Losing all lives shows Game Over and a Restart control that resets score, lives, and the arena. - Keep projectile lifetime bounded and prevent gameplay keys from scrolling the page. Verify: Test rotation, thrust, and firing near the initial spawn. Check that the ship changes heading, gains momentum, and emits moving projectiles. Sample the scene to inspect screen wrapping when an object crosses an edge.
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 · 23 messages
Build a playable Asteroids-style game on a canvas using procedural vector graphics. 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: - Use Left/Right to rotate the ship, Up to thrust, and Space to fire. Show the controls. The ship retains momentum and wraps around every screen edge; asteroids also wrap. - Spawn moving large asteroids. A bullet hit splits a large asteroid into smaller pieces; hitting a smallest piece removes it. Hits increase the score. - Start with three lives. A ship-asteroid collision removes one life, respawns the ship, and briefly protects it from immediate repeated damage. - Clearing all asteroids starts another wave. Losing all lives shows Game Over and a Restart control that resets score, lives, and the arena. - Keep projectile lifetime bounded and prevent gameplay keys from scrolling the page. Verify: Test rotation, thrust, and firing near the initial spawn. Check that the ship changes heading, gains momentum, and emits moving projectiles. Sample the scene to inspect screen wrapping when an object crosses an edge.
thinking
**Planning project creation** I recognize the need to create something polished. To start, I’ll need to use a browser for testing purposes. It seems essential to check through browser screenshots and interactions to see how everything looks and functions. I'll keep my focus on writing this as a single file to maintain clarity. This way, I can ensure that I’m building something that’s effective and user-friendly!
index.html (8755 bytes)Successfully wrote to index.html
thinking
{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
**Testing key functionality** I need to find test keys. Maybe I should consider using a key? It seems likely that sending an action type with the key could work, but I can't inspect the documentation right now. I think using `browser.key` with the text "ArrowRight" might be a way to test this out. Let’s see if that gives me the results I’m looking for!
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"ArrowRight","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
**Considering movement mechanics** I’m trying to figure out why the position is changing without the heading shifting. It seems like the key event might only affect up/down movements, not rotation. I think I need to check if the browser supports key press actions and maybe take a screenshot afterwards. I should probably test the upward thrust with the "ArrowUp" key—perhaps focusing on keydown and keyup actions to see if the ship rises. Then I can explore clicking the canvas as well.
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":" ","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"Space","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
**Identifying tool issues**
I’m thinking that maybe the tool isn’t quite holding up. I really need to look for any problems. One major code potential issue could be with `keys.has('Space')`, especially since the event uses `e.code`. The `key` tool is supposed to produce the actual `e.key`, but it might only be responding to typing. I wonder if the screenshot projectile isn't capturing correctly because it happens after a second? I need to ensure the motion is quick to capture properly.{"action":"motion","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[Browser image supplied to model]
Frame 2, +585ms
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Frame 3, +1185ms
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Frame 4, +1762ms
[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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
**Adjusting game events** I observed some asteroids crossing frames, which seems good. However, I need to adjust how the ship wraps, focusing on ensuring it pops correctly when crossing boundaries. I’m thinking about making the event fire on keydown to ensure instant action, but I’m also cautious about potential bugs when tapping the space key. It’s vital that everything fires correctly in the keydown event. I’ll also consider taking a screenshot to check if the bullet is visible afterwards. Let's make these edits!
{"path":"index.html","edits":[{"oldText":" addEventListener('keydown',e=>{if(['ArrowLeft','ArrowRight','ArrowUp','Space'].includes(e.code))Successfully replaced 1 block(s) in index.html.
thinking
**Troubleshooting firing sequence** I need to address the issue with the fireDelay sequence. Right now, pressing the space key has to trigger firing and then update the keys, but it seems like there's a delay or an issue with the firing not happening as expected. The next step is to reload and inspect the functionality of the space key to see if it properly triggers the shooting action. Alright, let's work on fixing this!
{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"Space","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
**Evaluating key tests** I see a promising bullet. I think I need to conduct a rotation and thrust test near the initial point. The key arrow might be one step too little, but it does seem to be pointing up still. It’s possible we could press many key calls to see if that shows any slight improvements. Overall, there's a lot to consider for refining the results and getting closer to what I need!
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"ArrowRight","delta":0}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":"SCORE\n000000\n✦ VECTOR ASTEROIDS ✦\nLIVES\n▲ ▲ ▲\n← → ROTATE ↑ THRUST SPACE FIRE · Clear the field to advance","images":"attached"}
thinking
Implemented the playable canvas game in **`index.html`**. Checked in browser: - Initial scene renders with score, three lives, controls, vector ship, and moving asteroids. - Space fires a visible moving projectile from the ship. - Observed asteroids moving across and wrapping at arena edges. - Confirmed no application console errors (only the sandbox iframe warning). Rotation/thrust behavior is implemented via held Arrow keys; the browser harness’s one-shot key simulation did not allow a reliable held-key momentum/heading verification.