✓ 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 labeled "Luft" at top moves crowns down as value increases toward "Wasser", but the crown starts at top and sinks as value increases — this is actually correct directionally, however the HTML range slider with writing-mode bt-lr means dragging UP increases value, which puts "water" at the top visually); no fall animation (crown teleports instantly with no transition), and mass is static/not labeled as a live value.
Slider direction is inverted (min=0 labeled "Luft" at top moves crowns down as value increases toward "Wasser", but the crown starts at top and sinks as value increases — this is actually correct directionally, however the HTML range slider with writing-mode bt-lr means dragging UP increases value, which puts "water" at the top visually); no fall animation (crown teleports instantly with no transition), and mass is static/not labeled as a live value.