Space Invaders · gpt-6.1-terra

Output generated Cost / run $0.0617 Runtime 80.1s

Prompt for this run

Build a playable Space Invaders-style game on a canvas using procedural 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 or A/D to move a cannon along the bottom and Space to fire upward. Display the controls and keep the cannon within the playfield. - Start with a grid of aliens that moves horizontally, reverses and descends at the edges, and fires toward the player. Player shots remove hit aliens and increase score once. - Place destructible bunkers between the cannon and aliens. Hits from either side remove bunker material persistently; shots can subsequently pass through the resulting gaps. - Start with three lives. Enemy shots cost a life with brief protection from repeated damage. Aliens reaching the player zone or zero lives causes Game Over; clearing the aliens shows a win state. - Provide Restart to restore aliens, bunkers, score, lives, and player position. Bound projectile lifetime and fire rate. Verify: Test movement and firing during the opening formation. Check alien motion and inspect a shot hitting a bunker or alien for visible damage or score feedback. Use Restart and check the initial formation, bunkers, lives, and score.

⛨ sandboxed Open in new tab ↗

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

modelgpt-6.1-terra

vendorOpenAI

harnesspi 0.87.1 · browser iteration

generated2026-10-26

METRICS

runtime80.1s

tokens in121k

tokens out6.3k

cached49k

cost / run$0.0617

Transcript · 23 messages

system

user

assistant

thinking

→ write index.html (15372 bytes)

toolResult

Successfully wrote to index.html

assistant

thinking

→ browser {"action":"inspect","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":[],"dom":"✳\nORBITAL DEFENSE\nARCADE DIVISION / EST. 1978\nSYSTEM ONLINE\n//\nSECTOR 01\n01 / DEFENSE PROTOCOL\nHold the line — save the sector.\nHIGH ORBIT · EARTH SECTOR\nLIVE FEED / SECTOR 01\nTHREAT LEVEL: HIGH\n▲ DEFENSE SYSTEM ACTIVE\nBUILT FOR SURVIVAL / / /\nMISSION STATUS\n●\nSCORE\n0000\nLIVES\n♥ ♥ ♥\nFLIGHT CONTROLS\n⌘\nMove cannon\n←\n→\nOR\nA\nD\nFire weapon\nSPACE\nMISSION BRIEF\n✳\n\nHostiles are approaching. Eliminate the formation before it reaches the defense line.\n\nUse the bunkers for cover. Both sides can damage them, so make every shot count.\n\n↻ RESTART MISSION\nPLAYER 01\nGOOD LUCK, PILOT.","images":"attached"}

assistant

thinking

**Testing movement firing**

I want to figure out the correct syntax for firing a movement in the browser. Specifically, I should be looking at using the key assigned to ArrowRight. It's essential to get this right for any functionality I need, so I’ll confirm the syntax to ensure everything works smoothly. Let’s see what I can find out about that! It might take a bit of exploration, but I'm on it!

→ browser {"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"ArrowRight","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

→ browser {"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"Space","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

**Improving player responsiveness**

I need to enhance the fire and movement responsiveness when a key is pressed briefly. The plan is to move the player 5px and fire immediately on keydown. I should make sure to avoid any issues with repeated keydowns causing extra speed by checking if keys are pressed. I also want to ensure the function to fire the player is reused effectively and prevents actions when the game is paused. Then, I'll need to test everything out.

→ edit

{"path":"index.html","edits":[{"oldText":"function updateHUD(){scoreEl.textContent=String(game.score).padStart(4,'0');livesEl.textContent='♥

toolResult

Successfully replaced 3 block(s) in index.html.

assistant

thinking

→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

→ browser {"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"ArrowRight","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

→ browser {"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"Space","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

→ browser {"action":"motion","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

Frame 2, +579ms

[Browser image supplied to model]

Frame 3, +1158ms

[Browser image supplied to model]

Frame 4, +1741ms

[Browser image supplied to model]

{"console":[],"dom":"✳\nORBITAL DEFENSE\nARCADE DIVISION / EST. 1978\nSYSTEM ONLINE\n//\nSECTOR 01\n01 / DEFENSE PROTOCOL\nHold the line — save the sector.\nHIGH ORBIT · EARTH SECTOR\nLIVE FEED / SECTOR 01\nTHREAT LEVEL: HIGH\n▲ DEFENSE SYSTEM ACTIVE\nBUILT FOR SURVIVAL / / /\nMISSION STATUS\n●\nSCORE\n0010\nLIVES\n♥ ♥ ♥\nFLIGHT CONTROLS\n⌘\nMove cannon\n←\n→\nOR\nA\nD\nFire weapon\nSPACE\nMISSION BRIEF\n✳\n\nHostiles are approaching. Eliminate the formation before it reaches the defense line.\n\nUse the bunkers for cover. Both sides can damage them, so make every shot count.\n\n↻ RESTART MISSION\nPLAYER 01\nGOOD LUCK, PILOT.","images":"attached"}

assistant

thinking

→ browser {"action":"click","x":1018,"y":688,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

Created `index.html`. Checked movement, firing, alien motion, score feedback, bunker damage, and Restart. The browser console showed no errors. Win and Game Over states were not played through.