✓ 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 (value=0 top→crowns in air uses transform offset logic that works, but label reads "Luft ↑ ↓ Wasser" while min=0 is at top mapping correctly via CSS appearance — however the crown movement formula uses (1-depth)*-150 meaning at depth=0/slider-top crowns are at 0px offset (in container) and at depth=1 fully moved, which is actually correct directionally), but mass/volume/density values are static not live-updating, no genuine fall animation (crowns teleport via transform), and splash fires continuously during mid-range rather than only on water entry.
Slider direction is inverted (value=0 top→crowns in air uses transform offset logic that works, but label reads "Luft ↑ ↓ Wasser" while min=0 is at top mapping correctly via CSS appearance — however the crown movement formula uses (1-depth)*-150 meaning at depth=0/slider-top crowns are at 0px offset (in container) and at depth=1 fully moved, which is actually correct directionally), but mass/volume/density values are static not live-updating, no genuine fall animation (crowns teleport via transform), and splash fires continuously during mid-range rather than only on water entry.