For the actual box, i was going to follow one of these 3 projects:
* bambooarcade.com (down for good but it's been backed up by archive.org)
* https://slagcoin.com/joystick/example2.html
* https://slagcoin.com/joystick/example3.html
Slagcoin.com is full of super interesting info.
Actually i just found out another project that could replace DaemonBite: https://gp2040-ce.info
I think the general instructions are pretty simple: it's just a matter of flashing the software on the board of choice, wiring everything as per the diagrams and shove everything inside a box (cardboard, ikea plastic boxes, wood, 3d printed cases... there's plenty of options)