✓ 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, max=100 labeled "Wasser" at bottom, but HTML range inputs render min at bottom in vertical mode with writing-mode:vertical-lr + direction:rtl), and crown movement is driven by a smooth easing function rather than direct 1:1 slider coupling, making the control feel indirect; all other features — dual crowns, correct physics values (gold 19.32 g/cm³, gilded 8.69 g/cm³, same 1000g mass), live panel updates, water rise, splash particles, and Heureka overlay — are solidly implemented.
Slider direction is inverted (min=0 labeled "Luft" at top, max=100 labeled "Wasser" at bottom, but HTML range inputs render min at bottom in vertical mode with writing-mode:vertical-lr + direction:rtl), and crown movement is driven by a smooth easing function rather than direct 1:1 slider coupling, making the control feel indirect; all other features — dual crowns, correct physics values (gold 19.32 g/cm³, gilded 8.69 g/cm³, same 1000g mass), live panel updates, water rise, splash particles, and Heureka overlay — are solidly implemented.