It should run on pretty much anything as it's using the most basic of ROM/mapper combinations. You can't save anything and this is by design. I want it to be more of a live performance instrument. Adding saving via battery RAM would be totally simple but I wanted to maximise compatibility with emulators and carts etc. Hopefully ENIO can make a big difference to these kind of issues, on hardware at least.
Oh and the name is cajoNES, with an 'A'.... a cajon is a traditional box-shaped percussive instrument from Peru. I have no idea what other connotations that name could have