✓ 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 (min=0/top maps to crowns in air, slider moves down to increase value — visually correct by CSS rotation trick, but the logical mapping depends on browser rendering of the rotated range input, making direction ambiguous/unreliable); physics values are accurate (Au 19.3 g/cm³, fake 13.0 g/cm³, same 1000 g mass), displaced water difference is clearly visible, and the ASCII art with animated water, splashes, rope, and Heureka overlay is impressively complete.
6,562 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0/top maps to crowns in air, slider moves down to increase value — visually correct by CSS rotation trick, but the logical mapping depends on browser rendering of the rotated range input, making direction ambiguous/unreliable); physics values are accurate (Au 19.3 g/cm³, fake 13.0 g/cm³, same 1000 g mass), displaced water difference is clearly visible, and the ASCII art with animated water, splashes, rope, and Heureka overlay is impressively complete.