Donut Games is a Sweden-based developer of casual games for the iPhone and the Flash platform. One of their top titles is the brilliantly bizarre Cows in Space. A mash-up of the space shooter genre and billiards, Cows in Space has to played to be believed, and is about the perfect two-minute game.

The premise of the game involves cows floating in outer space imprisoned inside bubbles. Obviously they need rescuing, so there are also star tokens floating in space. When a star token touches a cow's bubble, that bubble bursts, allowing the cow to teleport safely back to earth. How does a star touch a bubble? By firing a pink jelly ball at them which sets the token in motion when touched. The angles and strategies of Cows in Space are very much like a bizarre game of billiards.