— 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
Well-implemented generic Archimedes simulator with correct physics and smooth object animation, but entirely misses the prompt's core requirement: two crowns (pure gold vs. gilded), a vertical slider controlling crown submersion, fall/splash animations, and the Heureka reveal.
8,927 output tokens · claude-opus-4-6 · end_turn
Well-implemented generic Archimedes simulator with correct physics and smooth object animation, but entirely misses the prompt's core requirement: two crowns (pure gold vs. gilded), a vertical slider controlling crown submersion, fall/splash animations, and the Heureka reveal.