The next version of PyVaders has been released, and comes complete with windows installer and functional setup.py script. I have learned to bundle SDL_ttf with pygame and use a stock script to create a fully-functional self-contained executable (though, my data files are unpacked. Perhaps I can contain them too?).
I have yet to create the iconic 'houses' that you can hide behind to avoid alien shots, I'm unsure how to create them. Perhaps an array of square shapes?
I call this experiment largely a success. Now I should probably create a more interesting game, knowing that it is this easy