✓ 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
Slider direction is inverted (bottom=0%=crowns in air, top=100%=crowns in water) and the ASCII/canvas art approach is functional but visually sparse; the sequential crown-drop mechanic (gold first, then gilded) is a reasonable design choice, but physics values and live readouts are solid.
Slider direction is inverted (bottom=0%=crowns in air, top=100%=crowns in water) and the ASCII/canvas art approach is functional but visually sparse; the sequential crown-drop mechanic (gold first, then gilded) is a reasonable design choice, but physics values and live readouts are solid.