Good start

When the app is started it starts FaceTime. That’s OK but what is not OK is that there is no way to quit the app (short of throwing it in the trash). While the app is running initial response to gestures, even in good light, is at best sporadic and at worst simply non-existent. Once past the initial response, IE the drop-down is in place, response to gestures is super-sensitive and because of this, barely usable.
Needs work but as proof of concept is good start.

AlfredY24 about ControlAir, v1.0.1