✓ 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 is inverted — it is a horizontal range input rotated -90° via CSS transform, meaning dragging visually "down" actually increases the value correctly but the transform-based approach is fragile and the semantic direction is non-standard; also the crown Y position logic uses the same crownY for both crowns (bug: `const crownYGilded = getCrownY(sliderValue)` instead of a gilded-specific calc, though sizes differ), yet overall physics, visuals, data panel, and Heureka overlay are well-executed.
11,338 output tokens · claude-opus-4-6 · end_turn
Slider is inverted — it is a horizontal range input rotated -90° via CSS transform, meaning dragging visually "down" actually increases the value correctly but the transform-based approach is fragile and the semantic direction is non-standard; also the crown Y position logic uses the same crownY for both crowns (bug: `const crownYGilded = getCrownY(sliderValue)` instead of a gilded-specific calc, though sizes differ), yet overall physics, visuals, data panel, and Heureka overlay are well-executed.