✓ 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 is horizontal (not vertical as required), which is the main structural flaw; physics values (ρ_gold=19.3, ρ_fake=14.0, same 1000 g mass, correct buoyancy formula) are accurate, and the Heureka/sparkles/Archimedes end-state animation is a strong differentiator.
12,402 output tokens · claude-opus-4-6 · end_turn
Slider is horizontal (not vertical as required), which is the main structural flaw; physics values (ρ_gold=19.3, ρ_fake=14.0, same 1000 g mass, correct buoyancy formula) are accurate, and the Heureka/sparkles/Archimedes end-state animation is a strong differentiator.