Ok, so I downloaded the latest version but realized their was no GUI, so I used the GUI from an older version and it worked. Christmas Carol finally recognized my controller. So, I tried to run Burgertime, using the same process, and it didn't recognize the controller.
I'm glad I can at least play Christmas Carol, but it would be nice if I could play other Intellivision games as well. This emulator runs the games really well, but it is super unintuitive!
With Burgertime you have to use the same controller with which you entered the number of players. Since you have one controller, by default it's the left controller. On the keyboard the number pad is the left controller keypad and the main keyboard is the right controller keypad. If your keyboard doesn't have a number pad, press F6 and the main keyboard will change to the left controller keypad.
Edited by mr_me, Tue Jul 17, 2018 12:01 PM.