Red -- Flash Game

Red is one of many games through the ages (where "ages" means "about the last thirty years") wherein your sole goal is to defend yourself against encroaching baddies from space. In this case, however, you don't blow the baddies into their constituent baddie-bits. Rather, you gently urge them out of the way with a stream of what appear to be ping-pong balls or other balls of that nature. It's surprisingly fun, managing to be both challenging and meditative in that way that the best arcade-style games have.