@nprofile1q... I'd suggest a lower power Raspberry Pi, maybe a v2 or 3, because they're dirt cheap. If you're using a macro pad, that will just plug in directly and work without coding, but you will have to write a program to play the sounds of course. 3D printing keycaps for these is likely to be pretty hard, though.

I made a Simon style game as a demo for my makerspace several years back, using an older button board project I made years before. Happy to help if you need hints.