Your mission in this great flash game is to shoot down the enemy missiles that are attacking your base. And see how long you can last against the onslaught. Use YOUR MOUSE and click LEFT MOUSE BUTTON to fire a missile. Try to aim ahead of an incoming missile for best effect. Destroying missiles gives you resources which can be used to purchase upgrades. Upgrades use building shield energy. Use upgrades by clicking the button below the building or pressing the corresponding NUMBER KEY. Lets play!