I'll see if we can't find an ubuntu machine to test on. We've tested on Mac and Windows - but not on linux desktop- however we're using LibGDX cross platform game engine (open source), so I was hopeful it might just work (always test, ha!)
I ran it on Ubuntu 17.10, 64 bit with OpenJDK 1.8 and it worked like a charm. Can I help testing somehow?
The fact that it worked is interesting - so it does run on some linux builds then which is good! Two main differences I see is OpenJDK and 64 bit.