✓ 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
Live values for mass, volume, and density are static (hardcoded in HTML, not dynamically updated), so only displaced water qualifies as a true live value; all other physics and animation behavior is solid.
Live values for mass, volume, and density are static (hardcoded in HTML, not dynamically updated), so only displaced water qualifies as a true live value; all other physics and animation behavior is solid.