✓ 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 (slider value 0=crowns in air maps correctly but the visual writing-mode/direction attributes make the physical drag unintuitive — top of slider produces 0/air, but dragging down increases value into water which is physically backwards from the labelled hint "↑ hoch / ↓ ins Wasser"); otherwise a highly complete ASCII demo with smooth easing, multi-frame Heureka animation, splash particles, live physics panels, and correct Archimedes values throughout.
Slider direction is inverted (slider value 0=crowns in air maps correctly but the visual writing-mode/direction attributes make the physical drag unintuitive — top of slider produces 0/air, but dragging down increases value into water which is physically backwards from the labelled hint "↑ hoch / ↓ ins Wasser"); otherwise a highly complete ASCII demo with smooth easing, multi-frame Heureka animation, splash particles, live physics panels, and correct Archimedes values throughout.