✓ 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/top = crowns in air is correct but the slider is rotated -90deg via CSS making the physical top of the rendered slider correspond to value=100/water, not air as labeled); aside from that inversion UX issue, physics values are plausible and nearly all features are implemented with solid ASCII art flair.
8,675 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0/top = crowns in air is correct but the slider is rotated -90deg via CSS making the physical top of the rendered slider correspond to value=100/water, not air as labeled); aside from that inversion UX issue, physics values are plausible and nearly all features are implemented with solid ASCII art flair.