✓ 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 (value=0 maps to crown at top/air, but increasing value moves crown upward per the position formula crownTopPosition = 80 - sliderValue*0.8, which actually does lower the crown — however the labels say "Oben=Luft / Unten=Wasser" and slider increases downward in vertical mode, so direction is functionally ambiguous and crown motion is minimal/incorrect); buoyancy force calculation has a unit error (divides by 1,000,000 yielding milli-Newton scale values instead of real Newtons); mass/volume/density are shown as static text, not live reactive values; no smooth fall animation — crown jumps discontinuously; water displacement rising is correct qualitatively.
Slider direction is inverted (value=0 maps to crown at top/air, but increasing value moves crown upward per the position formula crownTopPosition = 80 - sliderValue*0.8, which actually does lower the crown — however the labels say "Oben=Luft / Unten=Wasser" and slider increases downward in vertical mode, so direction is functionally ambiguous and crown motion is minimal/incorrect); buoyancy force calculation has a unit error (divides by 1,000,000 yielding milli-Newton scale values instead of real Newtons); mass/volume/density are shown as static text, not live reactive values; no smooth fall animation — crown jumps discontinuously; water displacement rising is correct qualitatively.