Overkill

You are in Syria, in which military activities take place. You sit at the controls of a powerful military helicopter. This is a very important and responsible mission. Use your hotkey to increase lift helicopter, or vice versa to lower it to a lower altitude. Shoot the enemies by pressing "space." Avoid their bullets and heavy artillery rounds. Try to survive as long as possible, because you depend on the lives of hundreds of thousands of people. Demonstrate courage and bravery in this battle!