Enemies have occupied a city of strategic importance and approaching your base. You are positioned high above the ground and can take them out in large numbers. The enemy comes in three weights: solider, tanks and fighter jets, each has their own unique qualities. Tanks and jet fighters do the most damage, so you must try your best to destroy them first. Soldiers try to get past your defenses and if enough of them get in, they will take over your base and you will lose the game. Just keep you eyes on the damage and control meter on upper right corner of the screen or its game over. The operation of defending your base depends on your efforts