Protect the cows by getting them into the barn, but keep the aliens out!
While the premise is simple, the game itself is completely fresh, thanks largely to the intuitive new game mechanic. The cows and aliens are manipulated by the users’ fingers, which pushes them away; the opposite of how a magnet would work. Users can use up to five fingers on the iPhone or iPod Touch, or up to eleven (bring a friend) points on the iPad. It may be easy at first, but if you’re going for a high scores, you’ll be in for a challenge!
Source: The Game Website.