I can kind of get there with the default controls, I just don't like how it wants to map the buttons differently than how they are on gamepads. For example, why does Retroarch want A to be B, and X to be Y, etc? Makes no sense at all, and if I change them, for some reason in game I have no navigation controls or anything. In fact only the Select key works.
I did figure out how to setup an exit combo though...yay