✓ 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 (CSS rotate(-90deg) on a horizontal range flips the visual direction so dragging toward "Wasser" label actually increases value, but the label layout places "Luft" at top and "Wasser" at bottom while min=0 maps to air — direction is ambiguous/confusing at best; more critically the rotated slider's thumb moves right-to-left visually making top=water feel natural to users), but all physics values (gold 19.3, fake 12.5, volumes 51.8/80.0 cm³, displacement proportional to immersion) are accurate and the Heureka overlay with sparkles is a polished finishing touch.
9,872 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (CSS rotate(-90deg) on a horizontal range flips the visual direction so dragging toward "Wasser" label actually increases value, but the label layout places "Luft" at top and "Wasser" at bottom while min=0 maps to air — direction is ambiguous/confusing at best; more critically the rotated slider's thumb moves right-to-left visually making top=water feel natural to users), but all physics values (gold 19.3, fake 12.5, volumes 51.8/80.0 cm³, displacement proportional to immersion) are accurate and the Heureka overlay with sparkles is a polished finishing touch.