Aliens invaders, game for IOS

The alien invaders are shooting game in space where you can choose different players. It has 3 levels: Easy, Medium, Hard. To move left or right, you just need to tilt your device left or right. It use Accelerometer to move left and right. To shoot the enemy, you just need to touch the screen. This version 1.0 is for a single player only for now. You have 3 lives to play each game. If the enemy is bypassed your fighter jet, you will lost the each life. If you lost all 3 lives, you are either won or lost if you beat the highest score. You also can pick different scenes to play. It run on iPhone and iPad.