✓ 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 at top = crowns in air is correct, but the vertical-lr/rtl CSS combined with min=0/max=100 means dragging down increases immersion, which is correct behavior BUT the visual top of the slider corresponds to 0% — however the `writing-mode: vertical-lr; direction: rtl` combo actually makes max at top and min at bottom, so slider top=100%=water which is inverted); ASCII-art rendering is creative and functional, but water rise uses hardcoded non-proportional scaling per crown type rather than purely physics-derived ratios.
Slider direction is inverted (value=0 at top = crowns in air is correct, but the vertical-lr/rtl CSS combined with min=0/max=100 means dragging down increases immersion, which is correct behavior BUT the visual top of the slider corresponds to 0% — however the `writing-mode: vertical-lr; direction: rtl` combo actually makes max at top and min at bottom, so slider top=100%=water which is inverted); ASCII-art rendering is creative and functional, but water rise uses hardcoded non-proportional scaling per crown type rather than purely physics-derived ratios.