✓ 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 (top label = Wasser/water, bottom = Luft/air, but HTML value=0 at top maps to crowns in air — the visual labels are flipped relative to convention); no autonomous fall animation (crowns only move with manual slider drag, no tween/easing).
Slider direction is inverted (top label = Wasser/water, bottom = Luft/air, but HTML value=0 at top maps to crowns in air — the visual labels are flipped relative to convention); no autonomous fall animation (crowns only move with manual slider drag, no tween/easing).