✓ 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→crowns in air is correct, but the vertical-lr + rtl CSS combination renders thumb at bottom=0%/air, top=100%/water, which is backwards from the prompt's expected top=air, bottom=water UX); otherwise physics, live data panel, splash, water-rise, and Heureka overlay are all well-implemented.
7,846 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0→crowns in air is correct, but the vertical-lr + rtl CSS combination renders thumb at bottom=0%/air, top=100%/water, which is backwards from the prompt's expected top=air, bottom=water UX); otherwise physics, live data panel, splash, water-rise, and Heureka overlay are all well-implemented.