— 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
Completely misses the Archimedes/crowns prompt — implements a generic single-object buoyancy demo with horizontal density/size sliders and no vertical slider, no two crowns, no same-mass comparison, no fall animation, no splash, no heureka moment, and a dark background.
Completely misses the Archimedes/crowns prompt — implements a generic single-object buoyancy demo with horizontal density/size sliders and no vertical slider, no two crowns, no same-mass comparison, no fall animation, no splash, no heureka moment, and a dark background.