✓ 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 (min=0 maps to crowns in air, but a rotated horizontal range input visually reads top=air only by accident of CSS rotation — functionally val=0 is air and val=1000 is submerged, which is correct logically but the CSS rotate(-90deg) makes the low end visually appear at the bottom, so dragging down increases submersion — this is inverted from the spec); otherwise the implementation is comprehensive with correct Archimedes physics, live data panels, splash/bubble/heureka effects, and clear visual difference in water displacement between the two crowns.
11,081 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 maps to crowns in air, but a rotated horizontal range input visually reads top=air only by accident of CSS rotation — functionally val=0 is air and val=1000 is submerged, which is correct logically but the CSS rotate(-90deg) makes the low end visually appear at the bottom, so dragging down increases submersion — this is inverted from the spec); otherwise the implementation is comprehensive with correct Archimedes physics, live data panels, splash/bubble/heureka effects, and clear visual difference in water displacement between the two crowns.