
Also, what could I use to make the case? I would only want to use a 3D printed case as a last resort as I don't have a 3D printer.

Similar, but I've actually decided on a Gameboy-like layout for it. The internals would be a Raspberry Pi Zero Wireless (With GPIO pin attachment), a non-touchscreen LCD monitor (connected with GPIO pins), a stripped down USB NES controller, and a lithium ion battery /w low battery LED.