I just started setup of my arcade today. I am only going to do NES games on it. I have the Raspberry Pi 2 B with the newest Retropie software. I am working on getting my joysticks and buttons setup but in the meantime I am using a keyboard. it works throughout the menu then when I launch a game the controllers stop working. Please let me know how to setup these controls. I cant find it in any of the menus.