— 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 brief: no crowns, no vertical slider, no gold/gilded density comparison — it's a generic Archimedes buoyancy demo with a single ball and button-based controls.
Completely misses the brief: no crowns, no vertical slider, no gold/gilded density comparison — it's a generic Archimedes buoyancy demo with a single ball and button-based controls.