✓ 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
Remarkably complete ASCII-art implementation with correct physics (gold 19.32 g/cm³, gilded 10.2 g/cm³, same 1000 g mass), smooth eased slider animation, live info panels, splash frames, rising water levels, and Heureka reveal — but splash logic is stateful and can desync, crown row math for the descending phase is slightly inconsistent (crownRowAboveWater computed but unused), and ASCII rendering limits visual clarity of water rise difference between the two containers.
Remarkably complete ASCII-art implementation with correct physics (gold 19.32 g/cm³, gilded 10.2 g/cm³, same 1000 g mass), smooth eased slider animation, live info panels, splash frames, rising water levels, and Heureka reveal — but splash logic is stateful and can desync, crown row math for the descending phase is slightly inconsistent (crownRowAboveWater computed but unused), and ASCII rendering limits visual clarity of water rise difference between the two containers.