✓ 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
Exceptionally complete implementation hitting every required feature — physics values are correct (1000g, 19.3/12.8 g/cm³, 51.8/78.1 cm³), slider drag uses SVG coordinate math that works but the handle-drag hit-target is a small SVG circle making it fiddly, and the splash/ripple/Heureka animations are polished; only minor flaw is the exaggerated VOLUME_TO_PIXELS scale factor decoupling visual water rise from true proportional displacement.
14,235 output tokens · claude-opus-4-6 · end_turn
Exceptionally complete implementation hitting every required feature — physics values are correct (1000g, 19.3/12.8 g/cm³, 51.8/78.1 cm³), slider drag uses SVG coordinate math that works but the handle-drag hit-target is a small SVG circle making it fiddly, and the splash/ripple/Heureka animations are polished; only minor flaw is the exaggerated VOLUME_TO_PIXELS scale factor decoupling visual water rise from true proportional displacement.