Are you ready to defend the Earth from an alien invasion? This game will challenge you in defending your futuristic city by using an advanced cannon.The various game levels will increase the ability of alien spacecraft and thus also your performances need to increase if you want survive and save the Earth.Anyway you have the possibility to upgrade your cannon by earning virtual coins, this will help you in destroying the aliens wave.During the game you'll encounter some adversities that will require you to change your defense strategy, but if you are able to gain enough virtual coins then you can equip you with some special items that will help you in the fight.The control of your cannon is really simple so this game is suitable for all ages.What are you waiting for? The Earth need your help!