✓ 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
Only displaced-water updates live; mass, volume, and density values are hardcoded static text, not live readouts, and the crowns have no fall transition—they teleport rather than animate into the water.
Only displaced-water updates live; mass, volume, and density values are hardcoded static text, not live readouts, and the crowns have no fall transition—they teleport rather than animate into the water.