✓ 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 — label says "⬆ Luft" at top but the slider's rotated CSS horizontal-range maps min=0 (left/top) to max=100 (right/bottom), which actually moves crowns downward as expected, however the labels suggest air at top and water at bottom yet the slider thumb physically sits at the top at value=0 with the crowns in air, making direction technically correct but the UX is confusing due to CSS rotation mapping; the water-rise pixel computation uses an arbitrary scale rather than a true tank cross-section conversion, slightly undermining physics fidelity, but displayed values (density, volume, mass) are physically accurate.
10,735 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted — label says "⬆ Luft" at top but the slider's rotated CSS horizontal-range maps min=0 (left/top) to max=100 (right/bottom), which actually moves crowns downward as expected, however the labels suggest air at top and water at bottom yet the slider thumb physically sits at the top at value=0 with the crowns in air, making direction technically correct but the UX is confusing due to CSS rotation mapping; the water-rise pixel computation uses an arbitrary scale rather than a true tank cross-section conversion, slightly undermining physics fidelity, but displayed values (density, volume, mass) are physically accurate.