✓ 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 at top maps to crowns in air, but because the slider is CSS-rotated -90°, dragging toward the bottom of the screen actually increases value correctly in some browsers yet the logical mapping is ambiguous); no true fall animation — crowns teleport/slide linearly with no gravity arc; physics values (Au 19.3 g/cm³, gilded ~13.0 g/cm³, same 1000 g mass) are accurate and displacement differential is correctly shown.
5,046 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top maps to crowns in air, but because the slider is CSS-rotated -90°, dragging toward the bottom of the screen actually increases value correctly in some browsers yet the logical mapping is ambiguous); no true fall animation — crowns teleport/slide linearly with no gravity arc; physics values (Au 19.3 g/cm³, gilded ~13.0 g/cm³, same 1000 g mass) are accurate and displacement differential is correctly shown.