I added support for the buttons on the game face of M5Stack, (it's very similar to my #D1 Mini X-Pad Shield, I basically just had to change the numbers for the button maping, the I²C address, and negate the output). Together with the automatic 2× scaling, it means you can play the µGame games on it now (and, what is more important, easily make your own).

What I don't like is the noise from the speakers — for some reason that happens only when the face is connected, and not on USB — perhaps grounding issues? There is no sound from the game, because so far MicroPython doesn't support it (though technically it's possible, someone just needs to write the code).