✓ 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 — the label layout shows "🌊 Wasser" at top and "☁️ Luft" at bottom, but the rotated range input maps value=0 visually to bottom (air) yet the slider thumb physically sits at the bottom when value=0, creating a confusing mismatch; all other features are solidly implemented with correct physics (gold 19.32 g/cm³, fake 13.15 g/cm³, same 1000g mass), convincing canvas rendering, ripple/splash/heureka effects, and live data readouts.
10,061 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted — the label layout shows "🌊 Wasser" at top and "☁️ Luft" at bottom, but the rotated range input maps value=0 visually to bottom (air) yet the slider thumb physically sits at the bottom when value=0, creating a confusing mismatch; all other features are solidly implemented with correct physics (gold 19.32 g/cm³, fake 13.15 g/cm³, same 1000g mass), convincing canvas rendering, ripple/splash/heureka effects, and live data readouts.