✓ 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
Comprehensive ASCII-art implementation with correct physics (gold 19.3 g/cm³, gilded 8.9 g/cm³, same 300 g mass), live values, splash particles, and a multi-frame Heureka overlay — but the vertical slider is inverted (dragging down increases the value from 0→100 which maps to air→water, yet the tick labels show "Luft" at top and "Wasser" at bottom which is visually correct in layout but the slider's writing-mode/direction makes the physical drag direction counterintuitive/inverted on most browsers).
Comprehensive ASCII-art implementation with correct physics (gold 19.3 g/cm³, gilded 8.9 g/cm³, same 300 g mass), live values, splash particles, and a multi-frame Heureka overlay — but the vertical slider is inverted (dragging down increases the value from 0→100 which maps to air→water, yet the tick labels show "Luft" at top and "Wasser" at bottom which is visually correct in layout but the slider's writing-mode/direction makes the physical drag direction counterintuitive/inverted on most browsers).