✓ 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 (value=0/top = air, value=1000/bottom = water, but CSS writing-mode with direction:rtl flips the visual so the thumb at top maps to value 0 = air — actually direction appears correct in CSS but requires careful browser-specific validation; no fall animation (crowns teleport, no drop motion); mass/volume/density panels are static HTML, not JS-updated live values; water-rise visual cross-section is artificially scaled (VISUAL_CROSS_SECTION=12 cm²) but the qualitative displacement difference between crowns is correct and prominent.
10,351 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (value=0/top = air, value=1000/bottom = water, but CSS writing-mode with direction:rtl flips the visual so the thumb at top maps to value 0 = air — actually direction appears correct in CSS but requires careful browser-specific validation; no fall animation (crowns teleport, no drop motion); mass/volume/density panels are static HTML, not JS-updated live values; water-rise visual cross-section is artificially scaled (VISUAL_CROSS_SECTION=12 cm²) but the qualitative displacement difference between crowns is correct and prominent.