Just one minor note: I'm left-handed, but the position of the reload button on the bottom left corner means I either have to stop shooting and move my finger down to reload, or else use my comparatively inept right hand to shoot. Again, it's only a small observation but I thought I'd send it your way for consideration.
But, I also noticed that on tablets you would easily use both hands: one to shoot, other to reload, esp. on 10-inch tablet, where the distance is too great.
I guess I'll have to add a left-handed option to reverse the reload button and wave number.