— 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
Completely misses the brief — implements a generic Archimedes buoyancy sandbox with no crowns, no crown-fall animation, no vertical slider for crown submersion, dark background (not light), and no Heureka moment; physics math is sound but applied to the wrong problem entirely.
Completely misses the brief — implements a generic Archimedes buoyancy sandbox with no crowns, no crown-fall animation, no vertical slider for crown submersion, dark background (not light), and no Heureka moment; physics math is sound but applied to the wrong problem entirely.