✓ 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 at top maps to crowns in air, which is technically correct in HTML range orientation, but the visual layout labels "Luft" at top and "Wasser" at bottom while the rotated slider's thumb moves opposite to expectation — dragging down increases value and lowers crowns, which works, but the CSS rotation makes the physical thumb movement counterintuitive); physics values are sound (gold 19.32 g/cm³, gilded 13.0 g/cm³, same 1000g mass), heureka overlay is well-executed, and the ASCII art rendering with live data panel is a strong overall implementation.
7,808 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0 at top maps to crowns in air, which is technically correct in HTML range orientation, but the visual layout labels "Luft" at top and "Wasser" at bottom while the rotated slider's thumb moves opposite to expectation — dragging down increases value and lowers crowns, which works, but the CSS rotation makes the physical thumb movement counterintuitive); physics values are sound (gold 19.32 g/cm³, gilded 13.0 g/cm³, same 1000g mass), heureka overlay is well-executed, and the ASCII art rendering with live data panel is a strong overall implementation.