✓ 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, but slider renders with 0 at bottom on most browsers, making bottom=air/top=water), mass/volume/density panels are static labels rather than live-updating values, and crowns lack any fall animation — they simply teleport to position.
Slider direction is inverted (value=0 at top puts crowns in air, but slider renders with 0 at bottom on most browsers, making bottom=air/top=water), mass/volume/density panels are static labels rather than live-updating values, and crowns lack any fall animation — they simply teleport to position.