My two cents:

- The hit boxes on the toggle switches is very small and finicky. I tapped three times before it worked.

- Some of the controls look disabled, like the slider and toggle buttons. Combined with finickiness, it's a real UX frustration.

- The box shadows make the animations very slow. On my nexus 5x, I get maybe 5fps at best. It would be worthwhile to explore ways to improve them, like using SVG instead of box-shadow.

Otherwise, everything looks very clean.