well folks, I am using ubuntu dapper linux, and I did what you said: got the tarball PizzaGame-0.02a-Linux.tar.bz2, uncompressed it and ran ./pizzagame. It just said this:
./bin.donotrun: error while loading shared libraries: /usr/lib/OGRE/Plugin_GuiElements.so: cannot open shared object file: No such file or directory
which says to me that you are assuming a dependency on some gui toolkit called ogre or something which I don't have.
I don't know all that much about it, but it does seem to me that you need to think about this.
You should search the Ubuntu package reposity with aptitude for ogre:
aptitude search ogre
I think that will do the trick. If you find the right ogre files, use:
aptitude install thenameoftheogrepackagegoeshere
Then it should work. Else, you can get back here and it would be great if you could paste your results.