✓ 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 is CSS-rotated (not a true vertical input) and its direction is inverted — dragging down increases value from 0→100, meaning slider-bottom=water is correct logically but the visual orientation with rotate(-90deg) makes top of the rendered thumb correspond to max/water, which is direction-correct by feel but ambiguous; the bigger flaw is the splash triggers at a fixed t=0.3 threshold regardless of actual crown-water contact, making timing imprecise.
10,198 output tokens · claude-opus-4-6 · end_turn
Slider is CSS-rotated (not a true vertical input) and its direction is inverted — dragging down increases value from 0→100, meaning slider-bottom=water is correct logically but the visual orientation with rotate(-90deg) makes top of the rendered thumb correspond to max/water, which is direction-correct by feel but ambiguous; the bigger flaw is the splash triggers at a fixed t=0.3 threshold regardless of actual crown-water contact, making timing imprecise.