Controls are frustrating

I like this game but I dont like the limitation on controls. Why cant I use the arrow keys to drive the chopper? Why must I use the mouse to fire? Id prefer space bar. I control the chopper with my right hand, and it is very awkward to use the mouse with my left in order to shoot or vice-versa. Please add some choice in controllers on the keyboard.

macnonapples about Chopper 2