✓ 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 (label says top=air/bottom=water but the range input with -webkit-appearance:slider-vertical maps value=0 at bottom visually, making top=water and bottom=air in practice for many browsers); all other features are robustly implemented with physically accurate values, smooth canvas animation, splash/ripple effects, comparison bars, and a polished Heureka overlay.
11,972 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (label says top=air/bottom=water but the range input with -webkit-appearance:slider-vertical maps value=0 at bottom visually, making top=water and bottom=air in practice for many browsers); all other features are robustly implemented with physically accurate values, smooth canvas animation, splash/ripple effects, comparison bars, and a polished Heureka overlay.