✓ 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
Mass, volume, and density display values are hardcoded/static (not live-updating), and the slider is a custom drag widget rather than a native range input, making it slightly awkward; splash effects fire randomly rather than on crown entry, and there is no smooth fall animation—crowns jump position directly with the slider.
Mass, volume, and density display values are hardcoded/static (not live-updating), and the slider is a custom drag widget rather than a native range input, making it slightly awkward; splash effects fire randomly rather than on crown entry, and there is no smooth fall animation—crowns jump position directly with the slider.