✓ 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
Exceptionally complete implementation hitting every required feature with correct physics (gold 19.32 g/cm³, gilded 13.00 g/cm³, same 1000 g mass), smooth canvas rendering with ripples/bubbles/splashes, and a polished Heureka overlay — minor weakness is the pixel-scaled water rise (arbitrary 0.45 px/cm³ factor) rather than a geometrically derived tank cross-section calculation.
10,704 output tokens · claude-opus-4-6 · end_turn
Exceptionally complete implementation hitting every required feature with correct physics (gold 19.32 g/cm³, gilded 13.00 g/cm³, same 1000 g mass), smooth canvas rendering with ripples/bubbles/splashes, and a polished Heureka overlay — minor weakness is the pixel-scaled water rise (arbitrary 0.45 px/cm³ factor) rather than a geometrically derived tank cross-section calculation.