✓ 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
Mass, volume, and density values are hardcoded static displays rather than live-updating readouts, and the custom-div slider lacks the smoothness and accessibility of a native range input with no continuous fall animation — crowns teleport rather than animate.
Mass, volume, and density values are hardcoded static displays rather than live-updating readouts, and the custom-div slider lacks the smoothness and accessibility of a native range input with no continuous fall animation — crowns teleport rather than animate.