✓ 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
Solid physics (gold 19.3 g/cm³, alloy 13.0 g/cm³, same 1000 g mass, correct displacement ratio) and polished SVG visuals, but mass/volume/density display values are static text rather than live-updating elements, and crown entry has no discrete fall animation — crowns simply glide continuously with the slider.
10,808 output tokens · claude-opus-4-6 · end_turn
Solid physics (gold 19.3 g/cm³, alloy 13.0 g/cm³, same 1000 g mass, correct displacement ratio) and polished SVG visuals, but mass/volume/density display values are static text rather than live-updating elements, and crown entry has no discrete fall animation — crowns simply glide continuously with the slider.