— 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 Archimedes buoyancy demo with horizontal sliders and a generic ball object — no crowns, no crown comparison, no vertical slider, no fall/splash animation, and no Heureka moment; almost none of the prompt's specific requirements are met.
Implements a generic Archimedes buoyancy demo with horizontal sliders and a generic ball object — no crowns, no crown comparison, no vertical slider, no fall/splash animation, and no Heureka moment; almost none of the prompt's specific requirements are met.