✓ 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
All required features are implemented with correct physics (Au 19.3 g/cm³ vs 13.0 g/cm³, same 1000 g mass), but the ASCII-art rendering has a scoping bug in `drawContainer` (references outer `r` instead of `row` in the bounds check) that could cause ghost characters, and the crown immersion logic conflates crown depth with a single `t` fraction rather than tracking partial submersion stages distinctly.
7,484 output tokens · claude-opus-4-6 · end_turn
All required features are implemented with correct physics (Au 19.3 g/cm³ vs 13.0 g/cm³, same 1000 g mass), but the ASCII-art rendering has a scoping bug in `drawContainer` (references outer `r` instead of `row` in the bounds check) that could cause ghost characters, and the crown immersion logic conflates crown depth with a single `t` fraction rather than tracking partial submersion stages distinctly.