✓ 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/top=air mapped to value=0, but the rotated slider's visual top corresponds to max, so dragging "down" submerges crowns — opposite of the spec); no autonomous fall animation exists (crown position is purely slider-driven with no time-based drop).
14,521 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0/top=air mapped to value=0, but the rotated slider's visual top corresponds to max, so dragging "down" submerges crowns — opposite of the spec); no autonomous fall animation exists (crown position is purely slider-driven with no time-based drop).