✓ 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
Near-complete implementation with excellent visual polish, correct physics (gold 19.32 g/cm³, gilded 11.35 g/cm³, same 1000g mass), live data panel, particles/ripples/bubbles, and Heureka overlay; minor flaw is that both crowns use the same simplified submerged-fraction formula (goldSubFrac == fakeSubFrac initially, differing only via volume scaling) rather than tracking each crown's geometry-based immersion independently.
12,878 output tokens · claude-opus-4-6 · end_turn
Near-complete implementation with excellent visual polish, correct physics (gold 19.32 g/cm³, gilded 11.35 g/cm³, same 1000g mass), live data panel, particles/ripples/bubbles, and Heureka overlay; minor flaw is that both crowns use the same simplified submerged-fraction formula (goldSubFrac == fakeSubFrac initially, differing only via volume scaling) rather than tracking each crown's geometry-based immersion independently.