✓ 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
Mass, volume, and density are hardcoded static labels (not live updating spans), so those three live-value features fail; displaced water and immersion % do update live and physics values (19.3 g/cm³ gold, 13.0 g/cm³ gilded, same 1000 g mass) are correct, but slider direction logic has a messy dual-function remnant that leaves `currentT` at 0 until the user first moves the slider.
6,468 output tokens · claude-opus-4-6 · end_turn
Mass, volume, and density are hardcoded static labels (not live updating spans), so those three live-value features fail; displaced water and immersion % do update live and physics values (19.3 g/cm³ gold, 13.0 g/cm³ gilded, same 1000 g mass) are correct, but slider direction logic has a messy dual-function remnant that leaves `currentT` at 0 until the user first moves the slider.