All of that would be beyond me so I don't know. The only files available for the game are already here.
I am also a bit confused with your references to Linux. This was not built for Linux. It will run on Linux, Mac, and Windows because compiled Java can run on any platform that has a JVM(Java virtual machine). If you are trying to run this on a phone or something it might be better to look if your platform has support for JVM.