Joystick
EpyMC can be controlled with any digital joystick (or joypad) with at least 2 buttons: one for the OK action and one for BACK. I tested with different usb devices.
All you need to know to use your joystick is the device it use (by default /dev/input/js0) and follow a simple wizard under Configuration > Joystick. The wizard will ask you to press some keys on your device, thats all.