In Blue Defense you control a laser cannon on an unknown planet. This cannon rotates on the axis of the planet. When you begin the game the planet is located at the bottom of the screen. The cannon’s laser runs at a continual stream so all you have to do is tilt the iPhone in the direction you want to stream to go. Red objects will then fly towards to planet and you must destroy them before they reach the planet.
As you move on in Blue Defense the location of the planet will change. Sometimes it will be located at the bottom of a vertically positioned screen, other times at the bottom of a horizontally positioned screen, and in the later levels it’s positioned in the center of your screen for full 360 degree tilting. These position changes really break up the gameplay in a great way.
Overall Blue Defense really utilizes the iPhone’s control scheme and fluid controls are the most important thing for a shooter. At $0.99 Blue Defense is a steal.