✓ 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 (min=0/top=air is correct visually but HTML vertical range inputs have value=0 at bottom by default, making top actually the high end — the label says "Luft" at top but slider value increases downward, which is inconsistent with standard browser behavior and may render inverted depending on browser); physics values are sound (gold 19.3 g/cm³, gilded 5.0 g/cm³, same 1000g mass), displaced volume correctly proportional, and the ASCII-art approach is charming but limits animation fidelity and the splash/displacement become visually clear only at the very end of the slider range.
Slider direction is inverted (min=0/top=air is correct visually but HTML vertical range inputs have value=0 at bottom by default, making top actually the high end — the label says "Luft" at top but slider value increases downward, which is inconsistent with standard browser behavior and may render inverted depending on browser); physics values are sound (gold 19.3 g/cm³, gilded 5.0 g/cm³, same 1000g mass), displaced volume correctly proportional, and the ASCII-art approach is charming but limits animation fidelity and the splash/displacement become visually clear only at the very end of the slider range.