Game Annoying Airborne Apparatuses online

It was a beautiful day, the sun was smiling, and the clouds were like a cat's muzzle, but in one second, everything changed, the sky seemed the plane. It was an enemy aircraft, destroying it, there are thousands of such. Your task is to manage the anti-aircraft gun so that no enemy aircraft not slipped past you. For this purpose we use a variety of improvements. Fight lasts all day, and then counted and earned money is being renovated and improved tools. You can improve the accuracy, range, accuracy, destructive power, and so on.