✓ 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 is horizontal (not vertical) and inverted (left=air, right=water where prompt requires top=air, bottom=water); buoyancy force unit conversion is wrong (divides cm³ by 1e6 as if it were m³ then multiplies by 1000, yielding millinewtons not newtons); both crowns use the same submersion fraction formula in the animation loop, undermining the different-volume visual; but the core concept, crown visuals, wave/splash/heureka animations, and data panels are otherwise well-executed.
13,170 output tokens · claude-opus-4-6 · end_turn
Slider is horizontal (not vertical) and inverted (left=air, right=water where prompt requires top=air, bottom=water); buoyancy force unit conversion is wrong (divides cm³ by 1e6 as if it were m³ then multiplies by 1000, yielding millinewtons not newtons); both crowns use the same submersion fraction formula in the animation loop, undermining the different-volume visual; but the core concept, crown visuals, wave/splash/heureka animations, and data panels are otherwise well-executed.