Here's one of those games that seems really simple at first, but it is incredibly difficult to master. The object of xWUNG is pretty straightforward: you have a deadly chain that you can swing around to destroy enemies. You get bonuses for racking up combos. However, you have to beware of the debris from your conquered enemies, as it will kill you. I really appreciate the challenge here, and the ball-and-chain physics feel really natural. There are bosses also, but I've only made it far enough to see one.