✓ 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 (bottom of slider = air, per CSS `writing-mode: bt-lr` with min=0 at bottom mapping to air; instructions say "slide down to submerge" but the visual mapping is ambiguous/browser-dependent), otherwise a comprehensive ASCII-art implementation with correct physics (gold 19.3, fake 11.3 g/cm³, same 1000g mass), rising water levels, splash particles, bubbles, live data panel, and a well-executed Heureka overlay.
7,352 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (bottom of slider = air, per CSS `writing-mode: bt-lr` with min=0 at bottom mapping to air; instructions say "slide down to submerge" but the visual mapping is ambiguous/browser-dependent), otherwise a comprehensive ASCII-art implementation with correct physics (gold 19.3, fake 11.3 g/cm³, same 1000g mass), rising water levels, splash particles, bubbles, live data panel, and a well-executed Heureka overlay.