✓ 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
All 21 features implemented in a cohesive ASCII-art style; the main weakness is that both crowns share an identical Y-position (crownTopGold === crownTopFake throughout), eliminating any per-crown visual distinction in motion, and the water-fill rendering uses a single character type ('~'/':'/'.') rather than truly varying wave animation.
All 21 features implemented in a cohesive ASCII-art style; the main weakness is that both crowns share an identical Y-position (crownTopGold === crownTopFake throughout), eliminating any per-crown visual distinction in motion, and the water-fill rendering uses a single character type ('~'/':'/'.') rather than truly varying wave animation.