✓ 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
ASCII/text-art rendering approach is novel but lacks splash effects, crown rendering within the water grid is unreliable, and the slider is inverted (value=0 → air, value=100 → water, but the vertical slider's visual top maps to 100 meaning top=water, bottom=air).
ASCII/text-art rendering approach is novel but lacks splash effects, crown rendering within the water grid is unreliable, and the slider is inverted (value=0 → air, value=100 → water, but the vertical slider's visual top maps to 100 meaning top=water, bottom=air).