You should absolutely make your own! I’m just suggesting Teensy 3.2 if you want to base your build on Game Frame code. Teensy is Arduino-compatible and uses the Arduino IDE, but is much faster and has lots more RAM/Flash.
That said, I understand if you want to use the microcontrollers you have on hand. Just please understand you’re on your own as far as making the code work. I haven’t compiled the V1 branch in over 5 years.