Scaling Controls: There isn't much to say in this object. Some people have fat fingers, some people have small devices, some people have both. It wouldn't take too long to implement and it would be really helpful.
Transparent Pause Button: When I tried out 0% opacity to get a cleaner recording experience, I realized that the pause button still stays half-opaque. Although this might be nitpicky, I still think the pause buttom should adapt to the opacity settings.
Post suggestions regarding RVGL.