Rars are not well supported in Linux due to their proprietary nature. Tar.gz would probably be most preferred, but zip is fine too.
The AsteroidX file was not recognised as an executable file but as a shared library and I had to chmod u+x it in a terminal to be able to run it. It only gave the following error message:
error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory
I'm running Xubuntu Linux 64-bit