Factory is a simple factory-builder game that runs on a Teensy 4.0 connected to an 84x48 pixel Nokia 5110 LCD screen and 6 buttons. You can also play it here, compiled via emscripten.
Keyboard Controls:
I build a battery-powered handheld device that runs this as a birthday present for my Factorio-loving brother. I barely finished it in time, so I wasn't able to get any pictures of the final result before giving it to him.
Code is available here.