✓ 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
Excellent completeness with correct Archimedes physics (gold 19.3 g/cm³ vs gilded 13.0 g/cm³, same 1000 g mass), live data panel, rising water indicator with delta annotation, bubble/splash/wave effects, and Heureka overlay — mass/volume/density values are static HTML rather than dynamically updated via JS, which is the one notable gap.
10,920 output tokens · claude-opus-4-6 · end_turn
Excellent completeness with correct Archimedes physics (gold 19.3 g/cm³ vs gilded 13.0 g/cm³, same 1000 g mass), live data panel, rising water indicator with delta annotation, bubble/splash/wave effects, and Heureka overlay — mass/volume/density values are static HTML rather than dynamically updated via JS, which is the one notable gap.