✓ 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 (min=0/top=air is correct in intent but the vertical-lr + direction:rtl + orient=vertical combo makes the physical drag direction counterintuitive/browser-dependent), and crowns jump discretely with the slider rather than smoothly falling — there is no timed fall animation independent of slider movement.
Slider direction is inverted (min=0/top=air is correct in intent but the vertical-lr + direction:rtl + orient=vertical combo makes the physical drag direction counterintuitive/browser-dependent), and crowns jump discretely with the slider rather than smoothly falling — there is no timed fall animation independent of slider movement.