The comparison clip (the same script for every model)

Written from the prompt (test v1, checks v1). The model never saw them.

• ✓Opens without a page error
• ✓Test hooks present (getState, setGravity, pause, resume, reset)
• ✓Visible canvas, at least 800×6001920×1080
• ✓Animation is alive (frames keep changing)221 quadros em 3 s; imagem mudou
• ✓Smooth: median frame time under 25 msintervalo mediano 16.6 ms (~60 fps)
• ✓Starts by itself: balls fall and reach the binsdropped=128 inBins=110
• ✓At least 13 bins15 caixas
• ✓Counters add up (balls in bins ≤ balls dropped)soma=110 inBins=110 dropped=128
• ✗Bell-shaped histogram (half the balls in the middle third)terço central com 29% de 110 bolas
• ✓Pause freezes, resume continuespausado: 130→130; depois de retomar: 141
• ✓Changing gravity changes the scene850 → 680 (pedido 680.0)
• ✓Reset empties the binsdepois do reset: inBins=0 dropped=1
• ✓No uncaught exception during the session
• ✓No console errors
• ✓No network attempts