— 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 wrong demo — implements a generic Archimedes buoyancy sandbox with one adjustable cube and material/fluid sliders, with zero crown-specific content, no two-crown comparison, no vertical immersion slider, no fall/splash animation, no Heureka moment, and a dark background violating the light-bg requirement.
Completely wrong demo — implements a generic Archimedes buoyancy sandbox with one adjustable cube and material/fluid sliders, with zero crown-specific content, no two-crown comparison, no vertical immersion slider, no fall/splash animation, no Heureka moment, and a dark background violating the light-bg requirement.