✓ 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 CSS-rotated (not a native vertical input) and inverted: value=0 maps to crowns in air (top of visual track) but the slider thumb starts at the left/bottom of the rotated track, making direction ambiguous and potentially confusing; physics values, splash particles, rising water levels, live data panel, and Heureka overlay are all well-implemented.
7,828 output tokens · claude-opus-4-6 · end_turn
Slider is CSS-rotated (not a native vertical input) and inverted: value=0 maps to crowns in air (top of visual track) but the slider thumb starts at the left/bottom of the rotated track, making direction ambiguous and potentially confusing; physics values, splash particles, rising water levels, live data panel, and Heureka overlay are all well-implemented.