Looks like the Linux export is broken:
flydangerous.x86_64: error while loading shared libraries: UnityPlayer.so: cannot open shared object file: No such file or directory
UnityPlayer.so is missing.
Hi, that's curious ... I'm not sure how that's happened but it may explain a few other things I've heard if they exported over a previous install. I'll take a look when I'm back at my desktop at the end of the week, thanks!