✓ 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
Physics values and displacement logic are correct, but the crown rendering uses a simplistic 5-point triangle shape scaled by volume (not a realistic crown silhouette), the slider is a custom drag-thumb with no touch support and no fall animation — crowns teleport rather than animate into water.
Physics values and displacement logic are correct, but the crown rendering uses a simplistic 5-point triangle shape scaled by volume (not a realistic crown silhouette), the slider is a custom drag-thumb with no touch support and no fall animation — crowns teleport rather than animate into water.