The game is about defending your homeland against ufo's. You control few tanks of different color type. In order to crash invaders you should drag and interchange tanks positions to match ufo colors.
screenshots
Link to AppStore:
http://itunes.apple.com/us/app/rgb-defense/id465513928?l=ru&ls=1&mt=8
Game in webPlayer
http://www.rgbdefense.com/
