✓ 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
Slider direction is inverted (hint reads "up = into water", but physically slider-top should mean crowns in air); otherwise a polished, physics-correct, feature-complete demo with elegant Heureka overlay and particle splashes.
Slider direction is inverted (hint reads "up = into water", but physically slider-top should mean crowns in air); otherwise a polished, physics-correct, feature-complete demo with elegant Heureka overlay and particle splashes.