✓ 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/top = crowns in air, value=100/bottom = crowns in water is actually correct in HTML but vertical range inputs render inverted in most browsers — bottom of slider thumb corresponds to max value, so dragging down increases submersion, which is correct behavior but the label "EINTAUCHEN" is at top and "LUFTIG" is at bottom suggesting conceptual inversion); mass/volume/density values are static (not live-updating); no true fall animation — crown jumps discretely with slider position rather than animating independently.
Slider direction is inverted (value=0/top = crowns in air, value=100/bottom = crowns in water is actually correct in HTML but vertical range inputs render inverted in most browsers — bottom of slider thumb corresponds to max value, so dragging down increases submersion, which is correct behavior but the label "EINTAUCHEN" is at top and "LUFTIG" is at bottom suggesting conceptual inversion); mass/volume/density values are static (not live-updating); no true fall animation — crown jumps discretely with slider position rather than animating independently.