✓ 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 its direction is inverted — dragging down increases immersion when visually it should be the opposite — but all core physics, live data, dual-canvas rendering, splash/bubble effects, bar comparison, and Heureka overlay are solidly implemented.
10,491 output tokens · claude-opus-4-6 · end_turn
Slider is CSS-rotated (not a native vertical input) and its direction is inverted — dragging down increases immersion when visually it should be the opposite — but all core physics, live data, dual-canvas rendering, splash/bubble effects, bar comparison, and Heureka overlay are solidly implemented.