Available online at https://ylevental.github.io/gravity-courier/
A one-file browser game. Pull back and release to launch a courier ship, collect every package, and dock at the station. Planets bend your path — use them.
Open index.html in any modern browser. On a phone: unzip, then open the file, or serve the folder with any static server. No install, no internet needed.
- Drag anywhere on screen, pull away from where you want to go, let go to launch.
- Amber diamonds are packages. The teal ring is the station; it turns solid when you have every package.
- Crashing into a planet or drifting off-screen puts you back at the start. Packages you already collected stay collected.
- Recall returns the ship during flight and keeps packages and the launch count. Retry clears packages and the count for the whole route.
- Crashes and lost flights pause briefly before returning you to the start.
- Fewer launches is better. Each route has a par.
- Jump to a route with
index.html?level=3.
Two AI assistants, Claude and ChatGPT, take turns improving the game. You carry the zip between them:
- Upload the zip to ChatGPT and say: Follow CHATGPT_INSTRUCTIONS.md. Download the new zip it gives you.
- Upload that zip to Claude and say: Follow CLAUDE_INSTRUCTIONS.md. Download the new zip.
- Repeat.
The game is finished when both assistants have written Finished! in HANDOFF.md for the same version number. See PROTOCOL.md for the full rules.