My good friend Matt has a new iPhone app out. It’s called Pocketball and it’s a physics puzzle in the style of The Incredible Machine and Enigmo. Like every good puzzle, it starts off easy and keeps getting more challenging. The rules are always clear, but you gotta get cleverer with each level to keep going. At a criminal $1.99, with no nickel-and-diming, and in this economy, you can’t afford not to buy it.