✓ 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 "▲ Luft / ▼ Wasser" but the RTL/vertical-lr CSS flips the actual value mapping so top of physical slider sends max value = full submersion), and there is no fall animation — crowns teleport rather than smoothly descend.
Slider direction is inverted (hint reads "▲ Luft / ▼ Wasser" but the RTL/vertical-lr CSS flips the actual value mapping so top of physical slider sends max value = full submersion), and there is no fall animation — crowns teleport rather than smoothly descend.