✓ 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 at top maps to air, max=1000 at bottom maps to water, but the horizontal range input is rotated -90deg so visually the thumb starts at bottom=water and drags up to air, reversing expected UX); all physics, live values, splash/ripple/bubble effects, and Heureka animation are well-implemented.
11,782 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top maps to air, max=1000 at bottom maps to water, but the horizontal range input is rotated -90deg so visually the thumb starts at bottom=water and drags up to air, reversing expected UX); all physics, live values, splash/ripple/bubble effects, and Heureka animation are well-implemented.