HTML Opus #30
7.1
Evaluation
7.1 avg
7.5 physics accuracy
8.2 design quality
7.8 animation quality
5.5 slider ux
6.5 completeness
7 overall
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 rotated range input means dragging "up" increases value toward water, which is backwards UX-wise), and mass/volume/density are static labels rather than live reactive values.

9,949 output tokens · claude-opus-4-6 · end_turn

Slider direction is inverted (min=0/top=air is correct in intent but the rotated range input means dragging "up" increases value toward water, which is backwards UX-wise), and mass/volume/density are static labels rather than live reactive values.