Joystick support in O2EM

Has anyone tried using the port of O2EM (Odyssey 2 emulator)? The reason I was wondering is that I am unable to get the joystick to work in any of the games; even though the other emulators work fine. I am not sure if there is a configuration that I missed or if it isn’t support in the O2EM core yet I have tried this on Retroarch 1.0.0.3 beta as well as multiple nightlies. The main games that I have tried are U.F.O. and K.C. Munchkin.