✓ 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
Impressively complete ASCII-art implementation with correct physics (Au 19.3 g/cm³, Au/Ag 13.0 g/cm³, same 1000 g mass), live data panel, splash particles, rising water levels, and Heureka animation — but the slider direction is inverted (min=0 at top maps to "in air" which is visually correct by accident via `direction: rtl` CSS, needs verification) and the live "mass" display is static rather than dynamic, and the crown immersion percentage is simplified (both crowns shown at same submersion % rather than volume-accurate partial submersion).
7,318 output tokens · claude-opus-4-6 · end_turn
Impressively complete ASCII-art implementation with correct physics (Au 19.3 g/cm³, Au/Ag 13.0 g/cm³, same 1000 g mass), live data panel, splash particles, rising water levels, and Heureka animation — but the slider direction is inverted (min=0 at top maps to "in air" which is visually correct by accident via `direction: rtl` CSS, needs verification) and the live "mass" display is static rather than dynamic, and the crown immersion percentage is simplified (both crowns shown at same submersion % rather than volume-accurate partial submersion).