✓ 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 Archimedes physics (Au=19.3 g/cm³, alloy=13.0 g/cm³, same 1000g mass) and good live data panels, but mass is displayed as a static label rather than a live value element, and the crown art doesn't visually differentiate size well in the monospace grid.
5,255 output tokens · claude-opus-4-6 · end_turn
Solid ASCII-art implementation with correct Archimedes physics (Au=19.3 g/cm³, alloy=13.0 g/cm³, same 1000g mass) and good live data panels, but mass is displayed as a static label rather than a live value element, and the crown art doesn't visually differentiate size well in the monospace grid.