I love the “gameboy” device you have started here! The fact that Makecode can work on those smaller dedicated devices was one of the reasons I started using it. The buttons on those devices (adafruit, meowbit) are pretty bad, so hard to press. I was always thinking “man it would be awesome to just convert a gameboy” because the buttons are so nice.
MDF and light sanding always makes for a nice smooth surface. This one was kind of slapped together pretty quick as a “can it be done” situation. Lots of corners cut (pun intended?), I still have to seal it. The biggest angle is the inspiration to build the software around it (see: I Present: Native Linux Builds! ), I wanted to be able to use USB and some hardware I had laying around (La Frite board in the most recent case).
Is that an RPI zero? If so the GPIO should work fine and the native “elf” export they mostly support, but if you want you could try the “png-to-elf” converter I’ve built as well https://www.forthelearnofit.com/elf (mostly to keep me honest that it works). My converter also supports 4 player GPIO (not that it matters for your device unless of course it’s a very awkward setup 