✓ 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 (min=0 at bottom maps to air, but slider visually reads top-to-bottom opposite of intent), crowns teleport rather than animate falling, and the splash trigger zone is too narrow to reliably fire.
Slider direction is inverted (min=0 at bottom maps to air, but slider visually reads top-to-bottom opposite of intent), crowns teleport rather than animate falling, and the splash trigger zone is too narrow to reliably fire.