✓ 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 values are static (hardcoded labels), not live-updating displays; slider direction is inverted (min=0/top=air is correct visually but the CSS-rotated slider maps dragging up to increasing value, making the UX direction ambiguous/incorrect for a native vertical feel).
8,555 output tokens · claude-opus-4-6 · end_turn
Mass, volume, and density values are static (hardcoded labels), not live-updating displays; slider direction is inverted (min=0/top=air is correct visually but the CSS-rotated slider maps dragging up to increasing value, making the UX direction ambiguous/incorrect for a native vertical feel).