✓ 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 text-canvas approach with correct physics (1000g same mass, 19.3 vs 13.0 g/cm³, proportional displacement), but crown movement is instantaneous rather than animated and splash logic is unreliable due to tickCount modulo gating conflicting with the rAF loop.
Solid ASCII-art text-canvas approach with correct physics (1000g same mass, 19.3 vs 13.0 g/cm³, proportional displacement), but crown movement is instantaneous rather than animated and splash logic is unreliable due to tickCount modulo gating conflicting with the rAF loop.