✓ 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
Comprehensive implementation with correct physics (Au 19.32, gilded 11.00 g/cm³, same 1000g mass), animated splashes, bubbles, water surface waves, and a multi-phase Eureka animation, but the density values are shown as static text rather than truly live-computed readouts, and the submersion fraction heuristic is geometry-based rather than cleanly tied to slider t, introducing minor discontinuity.
11,612 output tokens · claude-opus-4-6 · end_turn
Comprehensive implementation with correct physics (Au 19.32, gilded 11.00 g/cm³, same 1000g mass), animated splashes, bubbles, water surface waves, and a multi-phase Eureka animation, but the density values are shown as static text rather than truly live-computed readouts, and the submersion fraction heuristic is geometry-based rather than cleanly tied to slider t, introducing minor discontinuity.