✓ 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
Slider direction is inverted (slider-vertical with direction:rtl maps top=100/water, bottom=0/air); no smooth fall animation — crown teleports linearly with no inertia or drop; ASCII art is charming and physics values (gold 19300, fake 10500 kg/m³, same 1 kg mass) are correct and clearly displayed.
Slider direction is inverted (slider-vertical with direction:rtl maps top=100/water, bottom=0/air); no smooth fall animation — crown teleports linearly with no inertia or drop; ASCII art is charming and physics values (gold 19300, fake 10500 kg/m³, same 1 kg mass) are correct and clearly displayed.