✓ 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
Physics values and live data panel are solid, but the ASCII-art visualization has no real fall animation or splash effects, the slider direction is inverted (value=0 puts crowns in air which is correct but slider thumb is at bottom/min which is visually top-of-range for a vertical slider — effectively the crown submerges as you drag down, which is correct, but the `writing-mode: bt-lr` orientation means the visual top of the slider is actually value=100/submerged, making direction inverted), and both crowns move identically with no distinct visual displacement difference in the rendered scene.
Physics values and live data panel are solid, but the ASCII-art visualization has no real fall animation or splash effects, the slider direction is inverted (value=0 puts crowns in air which is correct but slider thumb is at bottom/min which is visually top-of-range for a vertical slider — effectively the crown submerges as you drag down, which is correct, but the `writing-mode: bt-lr` orientation means the visual top of the slider is actually value=100/submerged, making direction inverted), and both crowns move identically with no distinct visual displacement difference in the rendered scene.