✓ 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 ASCII-art implementation with correct physics (gold 19.3 g/cm³, gilded 7.9 g/cm³, same 300 g mass), live info panel, rising water, splash effects, and multi-frame Heureka overlay, but both crowns move identically (no differential physics per crown) and the lack of true frame-by-frame fall animation limits visual impact.
Comprehensive ASCII-art implementation with correct physics (gold 19.3 g/cm³, gilded 7.9 g/cm³, same 300 g mass), live info panel, rising water, splash effects, and multi-frame Heureka overlay, but both crowns move identically (no differential physics per crown) and the lack of true frame-by-frame fall animation limits visual impact.