— 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
Implements a generic buoyancy demo with a single generic box and horizontal volume/density sliders — completely missing both crowns, the vertical crown-lowering slider, water displacement/rising level, splash effects, displaced-water live values, and the Heureka animation that the prompt requires.
Implements a generic buoyancy demo with a single generic box and horizontal volume/density sliders — completely missing both crowns, the vertical crown-lowering slider, water displacement/rising level, splash effects, displaced-water live values, and the Heureka animation that the prompt requires.