— 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
A well-built generic Archimedes simulator with correct physics and a polished dark UI, but it implements an entirely different concept — one generic object with density/volume sliders — instead of the required two-crown (pure gold vs. gilded) Archimedes story, and has no fall animation, no splash, no rising water, no vertical slider, no Heureka moment, and no crown-specific narrative at all.
A well-built generic Archimedes simulator with correct physics and a polished dark UI, but it implements an entirely different concept — one generic object with density/volume sliders — instead of the required two-crown (pure gold vs. gilded) Archimedes story, and has no fall animation, no splash, no rising water, no vertical slider, no Heureka moment, and no crown-specific narrative at all.