Is it using the 1.3-inch monochrome OLED display of the Arduboy or something smaller? (Guessing the 72 × 40 display of the Thumby?)

This is for 72×40 display right now but I was also working on an interface layer to abstract Thumby specific functionality in order to play on potentially other platforms running MicroPython/Python. Going to try and add that in the next iteration.