AppSafari - AlienTankz by Lighteyes Studio is an app for the iPhone, iPod Touch, and the iPad. This game is a horizontal scrolling shooter. Much like its vertical counterpart, AlienTankz has the screen moving left to right while you drive your tank trying to take down as many enemies as you can. It reminds me of Metal Slug in some ways. You pick up whatever powerups that drop and try to beat the boss of that stage.