✓ 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
Solid ASCII-art implementation with correct physics (Au 19.3 g/cm³, Au/Ag 13.0 g/cm³, same 1000 g mass), working slider, splash particles, rising water, and Heureka trigger — but mass, volume, and density are static labels rather than live-updating values, costing completeness points.
6,695 output tokens · claude-opus-4-6 · end_turn
Solid ASCII-art implementation with correct physics (Au 19.3 g/cm³, Au/Ag 13.0 g/cm³, same 1000 g mass), working slider, splash particles, rising water, and Heureka trigger — but mass, volume, and density are static labels rather than live-updating values, costing completeness points.