✓ 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 (same 1000 g mass, gold 19.3 vs silver-mix 10.5 g/cm³, live displaced-water and buoyancy readouts), but animation is purely frame-based text redraw with no smooth fall motion — crowns teleport per slider tick rather than animating independently.
Solid ASCII-art implementation with correct physics (same 1000 g mass, gold 19.3 vs silver-mix 10.5 g/cm³, live displaced-water and buoyancy readouts), but animation is purely frame-based text redraw with no smooth fall motion — crowns teleport per slider tick rather than animating independently.