DOOM is often the “hello world” for what’s possible on hardware, particularly when there’s a screen and some button inputs.
We ported Retro-Go https://github.com/ducalex/retro-go over to work on our QT Py ESP32 Pico board and since Retro-Go has a port of PrBoom for the ESP32, it pretty much just worked loading up the shareware DOOM1.WAD file off of a microSD card. Amazing how capable retro-go is once the hardware layout is defined.
Is this one of the smallest playable DOOM devices?