Well, it would use arrays (which I still don't understand how to use) so my advice is to get ideas from the example 7 in the sample project button thing in the menu, then goto EX7ALIEN and check out the code there.
truely TRUELY sorry, but in order for hou to make space shooter, you need to use your own code, because i already made a game off that code, called,'Dorito Shooter'.heres the key if you want to check it out. and im sorry that you cant do it off that because i did it already, but for that, ill help on your game.