From the creator’s post
not the full promptSpaceEngine doesn't run on Mac, so I built a universe simulator in the browser with three.js and WebAssembly, using Claude Opus 5.5, in 2–3 days.
Real gravity, general relativity, NASA data. Try falling into a black hole, and ⌘K.
Free, no account:
Adds a render step. Works best with the HyperFrames or Remotion skills installed. Free, no sign-up.
Prompt by @yahiaesalem. Prompts belong to their creators.