✓ 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 slider min=0/max=100 with no orient inversion means dragging up increases value, sending crowns down — effectively top=submerged at max, bottom=air at min when vertical); mass stat boxes display static "1000g" text with no dynamic ID, so live_value_mass is absent; no discrete fall animation — crowns slide linearly with no entry sequence; splash fires stochastically throughout submersion rather than only at water entry.
Slider direction is inverted (value=0 at top puts crowns in air correctly, but slider min=0/max=100 with no orient inversion means dragging up increases value, sending crowns down — effectively top=submerged at max, bottom=air at min when vertical); mass stat boxes display static "1000g" text with no dynamic ID, so live_value_mass is absent; no discrete fall animation — crowns slide linearly with no entry sequence; splash fires stochastically throughout submersion rather than only at water entry.