— 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 general Archimedes buoyancy simulator with correct physics and a polished dark UI, but is entirely off-topic: there are no crowns, no gold vs. gilded crown comparison, no vertical fall-into-water animation, no splash effects, and the only sliders are horizontal controls for density/volume/submersion — not the crown-dipping vertical slider specified.
Implements a general Archimedes buoyancy simulator with correct physics and a polished dark UI, but is entirely off-topic: there are no crowns, no gold vs. gilded crown comparison, no vertical fall-into-water animation, no splash effects, and the only sliders are horizontal controls for density/volume/submersion — not the crown-dipping vertical slider specified.