✓ 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 visually rotated via CSS transform (not a true vertical input) and its direction is inverted — value=0 is at top (air) visually but the CSS rotation flips the thumb, making the mapping ambiguous and potentially counterintuitive; all other physics and features are well-implemented.
13,200 output tokens · claude-opus-4-6 · end_turn
Slider is visually rotated via CSS transform (not a true vertical input) and its direction is inverted — value=0 is at top (air) visually but the CSS rotation flips the thumb, making the mapping ambiguous and potentially counterintuitive; all other physics and features are well-implemented.