✓ 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
Exceptionally complete implementation covering all required features including physics-accurate values (gold 19.32 g/cm³, gilded 12.5 g/cm³, same 1000g mass), live data panels, animated bar chart, splash/ripple/bubble effects, rising water level, and a polished Heureka overlay — the main weakness is the vertical slider being a rotated horizontal input (via CSS transform), which can feel imprecise and has no smooth interpolation between slider moves.
10,420 output tokens · claude-opus-4-6 · end_turn
Exceptionally complete implementation covering all required features including physics-accurate values (gold 19.32 g/cm³, gilded 12.5 g/cm³, same 1000g mass), live data panels, animated bar chart, splash/ripple/bubble effects, rising water level, and a polished Heureka overlay — the main weakness is the vertical slider being a rotated horizontal input (via CSS transform), which can feel imprecise and has no smooth interpolation between slider moves.