✓ 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
Physics and live data panel are solid (same mass, correct densities, proper displacement scaling), but both crowns move identically and there is no true fall animation — crowns glide linearly with no easing, no distinct per-crown entry sequence, and the "splash" fires randomly on slider drag rather than on a discrete water-entry event.
Physics and live data panel are solid (same mass, correct densities, proper displacement scaling), but both crowns move identically and there is no true fall animation — crowns glide linearly with no easing, no distinct per-crown entry sequence, and the "splash" fires randomly on slider drag rather than on a discrete water-entry event.