'MINION EYBALLs turns : left or both eyes togheter with pinch (too big eyes)

let the minion eyes turn by pinch gesture
problem : I changed to the code to be seen into the FULL it is bigger shown..
what is causing this problem?

ADDITIONAL SCRIPTS

unpkg.com/ml5@1.2.1/dist/ml5.min.js

LIBRARIES

Pizzazz Three Cam

DOCS

Pic Container Circle Label Button Toggle Pane Waiter Slider tap hitTestCircles animate loop pos loc mov top alp sca scaleTo addTo removeFrom center expand zgo