✓ 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
Solid physics values (gold 19.3 g/cm³, gilded 6.0 g/cm³, same 1000 g mass) and live data panel, but the crown rendering is geometrically odd (ellipse-stacking), there is no discrete fall animation (crowns just translate linearly), and the water-level rise uses an ad-hoc scale factor rather than true volume-to-pixel mapping.
Solid physics values (gold 19.3 g/cm³, gilded 6.0 g/cm³, same 1000 g mass) and live data panel, but the crown rendering is geometrically odd (ellipse-stacking), there is no discrete fall animation (crowns just translate linearly), and the water-level rise uses an ad-hoc scale factor rather than true volume-to-pixel mapping.