✓ 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 at top renders crowns in air, but a horizontal range rotated -90° maps its visual bottom to the "air" end — the hint labels say top=air/bottom=water yet sliding toward max pushes crowns down, which is actually correct behaviorally but the rotation inversion makes the thumb travel opposite to expectation); mass, volume, and density values are static HTML, not live-updating, so those three live-value features are absent.
8,032 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top renders crowns in air, but a horizontal range rotated -90° maps its visual bottom to the "air" end — the hint labels say top=air/bottom=water yet sliding toward max pushes crowns down, which is actually correct behaviorally but the rotation inversion makes the thumb travel opposite to expectation); mass, volume, and density values are static HTML, not live-updating, so those three live-value features are absent.