✓ 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 (value=0 at top puts crowns in air correctly, but the writing-mode/appearance means the physical drag direction is browser-inconsistent), volume and density live values are static not dynamic, water level does not visibly rise in the ASCII art, and crown "fall animation" is instantaneous position snap rather than a smooth fall.
Slider direction is inverted (value=0 at top puts crowns in air correctly, but the writing-mode/appearance means the physical drag direction is browser-inconsistent), volume and density live values are static not dynamic, water level does not visibly rise in the ASCII art, and crown "fall animation" is instantaneous position snap rather than a smooth fall.