— Two crowns — Same mass, different density — Vertical slider ✓ Slider works — Slider controls crowns — Slider direction correct — Full slider range — Fall animation ✓ Water displacement — Rising water level — Splash effects ✓ Physics correct ✓ Live mass value ✓ Live volume value ✓ Live density value ✓ Live displaced water — Gilded displaces more — Heureka animation ✓ No external deps — Light bg / dark text ✓ Self-contained HTML
A general Archimedes buoyancy simulator with solid physics and ASCII rendering, but entirely misses the prompt's requirements: no two crowns, no vertical slider controlling crown submersion, no fall/splash animation, no Heureka moment, and dark background violates the light-bg constraint.
8,011 output tokens · claude-opus-4-6 · end_turn
A general Archimedes buoyancy simulator with solid physics and ASCII rendering, but entirely misses the prompt's requirements: no two crowns, no vertical slider controlling crown submersion, no fall/splash animation, no Heureka moment, and dark background violates the light-bg constraint.