iPhone Games: Geodefense Swarm

I'll just quickly throw a plug towards Critical Thought Games, makers of the wildly popular iPhone game Geodefense. A cross between the simple gameplay of tower defense, and the aesthetic of Geometry Wars. They've just released a new game on the App Store, called Geodefense Swarm. What's new in this game is a hex-style board that is almost completely open, and it's up to you to create a pathway for the enemies to follow. The game moves at a much faster and much more difficult pace than Geodefense, which was very hard to begin with.
99 cents on the app store. Click on the link, it'll take you right to the iTunes page!