I built my picade some days ago, and I loved it. It's amazing. :)
Now I tried some N64 games with Retropie 4.02 and they work just fine. But only with my Xbox One Controller attached to the usb port.
Whatever I tried, I didn't get the Picade Joystick and Butons to work.
Did anyone here yet solve this problem, or has some ideas? :)