Aim with the mouse, and shoot with space or click. Try to get all the helicopters, since if a helicopter gets past you, you lose 10 ammo. With each helicopter you shoot, you gain 3 ammo, and your supply of ammo keeps increasing. Watch out for the parachuters, though. When there are a lot of them they charge you, and if you touch one of them, you'll die. Watch out for an airplane! You better shoot it down quickly. Watch out for one special helicopter! (hint for the people who bothered to read this: it comes in 15 to 20 seconds and fires a missile at you. But you have your own missile, too. Once the "Missile" variable shows ready, you can press "m" to bring in a missile (bigger than theirs). Use the n key to use a bomb that comes relatively quickly. You can use this once for free, then afterwards you can buy them. Use the "b" key when you are desperate and people are attacking you or a tank is here.
