✓ 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 labeled "Luft" at top maps correctly in label but the vertical slider renders with 0 at bottom in most browsers, making top=water); water level rises in the wrong direction (y increases downward, so the water rect moves down rather than up); mass/volume/density are static labels not live-updating displays; fall animation is absent (crowns teleport).
Slider direction is inverted (min=0 labeled "Luft" at top maps correctly in label but the vertical slider renders with 0 at bottom in most browsers, making top=water); water level rises in the wrong direction (y increases downward, so the water rect moves down rather than up); mass/volume/density are static labels not live-updating displays; fall animation is absent (crowns teleport).