✓ 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 (label "Hoch" at top/low-value end moves crowns INTO water, "Tief" at bottom/high-value end, but the slider value=0 starts crowns in air which is correct semantically yet the physical labels Hoch/Tief are swapped relative to crown position); no smooth fall animation (crowns jump linearly with slider drag rather than animating autonomously); physics values are plausible and the gilded crown visibly displaces more water.
Slider direction is inverted (label "Hoch" at top/low-value end moves crowns INTO water, "Tief" at bottom/high-value end, but the slider value=0 starts crowns in air which is correct semantically yet the physical labels Hoch/Tief are swapped relative to crown position); no smooth fall animation (crowns jump linearly with slider drag rather than animating autonomously); physics values are plausible and the gilded crown visibly displaces more water.