Title: Alien Aggressors
Description: Alien Aggressors is a replica of the old arcade games "Space Invaders" and "Galaga". Move left and right to shoot down all of the aliens. The game itself is displayed sideways on the Zune screen.
The developer, Nick Gravelyn, has also released a detailed tutorial on how this game was made - a great primer for those interested in creating games.
Developer: Nick GravelynRatings & Reviews
Download link: http://nick.gravelyn.com/2008/05/07/alien-aggressors-zune-edition