— 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 principle demo with solid physics and a polished dark-themed SVG UI, but is entirely missing the two-crown (pure gold vs. gilded) scenario, the vertical crown-dipping slider, fall/splash animations, the Heureka moment, and uses a dark background instead of light — virtually none of the specific prompt requirements are met.
Implements a general Archimedes principle demo with solid physics and a polished dark-themed SVG UI, but is entirely missing the two-crown (pure gold vs. gilded) scenario, the vertical crown-dipping slider, fall/splash animations, the Heureka moment, and uses a dark background instead of light — virtually none of the specific prompt requirements are met.