✓ 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) means crowns in air and value=100 (bottom) means submerged, but the CSS uses `writing-mode: bt-lr` with `rotate(-90deg)` which visually flips the slider so that dragging toward the bottom of the page actually increases the value, making the top of the track correspond to 100 (water) rather than 0 (air), violating the spec; all other features (ASCII art, physics values, live data panel, heureka banner, splash effects, rising water) are genuinely implemented and physically plausible.
9,310 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted — value=0 (top) means crowns in air and value=100 (bottom) means submerged, but the CSS uses `writing-mode: bt-lr` with `rotate(-90deg)` which visually flips the slider so that dragging toward the bottom of the page actually increases the value, making the top of the track correspond to 100 (water) rather than 0 (air), violating the spec; all other features (ASCII art, physics values, live data panel, heureka banner, splash effects, rising water) are genuinely implemented and physically plausible.