✓ 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 at top maps to crowns in air, but the CSS rotate(-90deg) + bt-lr writing-mode causes the visual top of the slider to correspond to value=0/air which is actually correct behavior to verify carefully — however the slider thumb at top = value 0 = crowns in air is logically correct, but the visual presentation via rotate may be confusing; the lack of true fall animation (crowns teleport per slider position rather than having an independent drop animation) is a notable gap; ASCII art approach is creative but the crown rendering with multi-byte Unicode chars causes off-by-one column alignment issues.
6,427 output tokens · claude-opus-4-6 · end_turn
Slider direction is inverted (min=0 at top maps to crowns in air, but the CSS rotate(-90deg) + bt-lr writing-mode causes the visual top of the slider to correspond to value=0/air which is actually correct behavior to verify carefully — however the slider thumb at top = value 0 = crowns in air is logically correct, but the visual presentation via rotate may be confusing; the lack of true fall animation (crowns teleport per slider position rather than having an independent drop animation) is a notable gap; ASCII art approach is creative but the crown rendering with multi-byte Unicode chars causes off-by-one column alignment issues.