✓ 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 SVG-only implementation with iterative water-rise physics, particle splashes, wave animation, and HEUREKA fade-in — but the slider is a custom drag target (no native range input), which reduces reliability, and the slider_direction_correct check passes (top=air, bottom=water).
10,362 output tokens · claude-opus-4-6 · end_turn
Comprehensive SVG-only implementation with iterative water-rise physics, particle splashes, wave animation, and HEUREKA fade-in — but the slider is a custom drag target (no native range input), which reduces reliability, and the slider_direction_correct check passes (top=air, bottom=water).