— 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 competent generic Archimedes buoyancy simulation with correct physics and ASCII rendering, but completely misses the prompt's core requirement: two crowns (pure gold vs. gilded), same mass/different density comparison, a vertical immersion slider, and the Heureka narrative — it's a general density/buoyancy toy, not the Archimedes crown experiment.
Implements a competent generic Archimedes buoyancy simulation with correct physics and ASCII rendering, but completely misses the prompt's core requirement: two crowns (pure gold vs. gilded), same mass/different density comparison, a vertical immersion slider, and the Heureka narrative — it's a general density/buoyancy toy, not the Archimedes crown experiment.