✓ 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
All required features are present and physics are correct (gold 19.3 g/cm³, gilded 8.7 g/cm³, same 1000 g mass, proportional displacement), but the ASCII-art rendering of the wider gilded crown is clipped/misaligned and the water-rise visual scaling (×1.5 factor) is arbitrary rather than geometrically faithful.
All required features are present and physics are correct (gold 19.3 g/cm³, gilded 8.7 g/cm³, same 1000 g mass, proportional displacement), but the ASCII-art rendering of the wider gilded crown is clipped/misaligned and the water-rise visual scaling (×1.5 factor) is arbitrary rather than geometrically faithful.