✓ 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
Slider direction is inverted (pushing up = crown goes deeper, contrary to the prompt spec of top=air/bottom=water), displacement physics is proportional to depth fraction of diameter rather than true submerged volume, and there is no distinct fall animation — crowns teleport without dropping.
Slider direction is inverted (pushing up = crown goes deeper, contrary to the prompt spec of top=air/bottom=water), displacement physics is proportional to depth fraction of diameter rather than true submerged volume, and there is no distinct fall animation — crowns teleport without dropping.