✓ 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 maps to crowns in air, slider thumb visually at bottom in default orientation with rotated input, creating counterintuitive UX); physics values are correct (1000g, 19.3 vs 13.0 g/cm³, gilded crown displaces more), ASCII rendering is creative but crown characters clip partially below water without visual differentiation, and Heureka trigger and data panel are well-implemented.
6,581 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 maps to crowns in air, slider thumb visually at bottom in default orientation with rotated input, creating counterintuitive UX); physics values are correct (1000g, 19.3 vs 13.0 g/cm³, gilded crown displaces more), ASCII rendering is creative but crown characters clip partially below water without visual differentiation, and Heureka trigger and data panel are well-implemented.