We talk about a wide variety of iPhone games in this feature, but we're increasingly in support of games like Canabalt which require just a single touch to play. Call us lazy, but one-thumb tapping seems to be the exact amount of interaction we need on our phones, and Crush the Castle, our latest iPhone addiction, delivers on just that.
You play as a sentient trebuchet attacking an increasingly intricate and fortified series of castles filled to the brim with royalty and their servants. With a single touch, you'll start the firing arc, with a second tap to choose the exact moment to release your (increasingly potent) ammunition. The fewer shots it takes you to bring down the castle, the greater the reward, in the form of bronze, silver and gold medals.