✓ 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 per hint text ("slider hochziehen = ins Wasser"), and there is no true frame-based fall animation — crown position is purely slider-driven with no autonomous movement.
Slider direction is inverted per hint text ("slider hochziehen = ins Wasser"), and there is no true frame-based fall animation — crown position is purely slider-driven with no autonomous movement.