Prompt
Rebuild "Gravity Golf" as a separate, playable browser game using JavaScript, HTML, Canvas 2D, Browser. Preserve the observed gameplay: A 20-level orbital physics puzzle. Sling-launch a probe and use planetary gravity to send it through a wormhole, preview trajectories, adjust launch angle and force, and earn stars based on attempts while saving progress. Use Claude Opus 5.5 only as the documented creator attribution; some games call DeepSeek at runtime, which is separate from the build-model claim. Use a scripted/demo fallback when the optional model or network is unavailable. Implement the source-observed start state, controls, rules, game-state transitions, progression and completion/failure feedback. Keep it self-contained and verify the behavior against https://github.com/swan4er/opus-100-projects/blob/main/096-gravity-golf/README.md and https://github.com/swan4er/opus-100-projects/blob/main/096-gravity-golf/index.html.