I think the guy who gave 2 stars below is crazy. This is the best Mac screensaver in years! Kudos to the developer.

What I especially appreciate is despite that fact that a lot is going on on-screen, Space Wars is not a CPU hog. I hate it when a pretty screensaver uses so much processing power that my PowerBook G4's fan has to spin up (the main drawback with Marine Aquarium, among others). The computer is supposed to be resting, for crying out loud!