✓ 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 top labeled "Luft", max=100 at bottom labeled "Wasser", but HTML range sliders render max at the top visually when vertical, meaning the slider thumb starts at the bottom/water end), mass/volume/density values are static (not live-updating), and there is no smooth fall animation — crowns jump/translate linearly with no gravity feel.
Slider direction is inverted (min=0 at top labeled "Luft", max=100 at bottom labeled "Wasser", but HTML range sliders render max at the top visually when vertical, meaning the slider thumb starts at the bottom/water end), mass/volume/density values are static (not live-updating), and there is no smooth fall animation — crowns jump/translate linearly with no gravity feel.