✓ 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
Solid ASCII-art implementation with correct physics (same mass 1000g, gold 19.3 g/cm³ vs alloy 13.0 g/cm³, larger volume displaces more water) and smooth animation loop, but the slider direction is inverted (value=0 at top means crowns in air, yet sliding DOWN increases depth — which is technically correct for a standard range slider but the vertical-lr/rtl CSS setup and no explicit top/bottom labeling makes direction ambiguous; more critically, mass and density are static labels not live-updating spans, and the ASCII crown overlap with water rendering causes visual artifacts.
Solid ASCII-art implementation with correct physics (same mass 1000g, gold 19.3 g/cm³ vs alloy 13.0 g/cm³, larger volume displaces more water) and smooth animation loop, but the slider direction is inverted (value=0 at top means crowns in air, yet sliding DOWN increases depth — which is technically correct for a standard range slider but the vertical-lr/rtl CSS setup and no explicit top/bottom labeling makes direction ambiguous; more critically, mass and density are static labels not live-updating spans, and the ASCII crown overlap with water rendering causes visual artifacts.