Linux build is up

As part of the latest push I added a linux build. No idea if it works very well as I don’t have a linux machine at the moment. Let me know if it does or not, or if you have linux and want access to help test.

Unity makes it very easy to cross compile to MacOS and Linux from Windows and itch makes distributing it a breeze too. It’s great being an indie game dev in 2021! Technology wise at least :)