1) The goal of the game is to keep the gun away from the falling bombs, trying to shot them or the aircraft. 2) The game is considered lost when the gun is hit by the bomb and therefore destroyed. Also, the game is lost when all the buildings are destroyed. 3) The game is terminated upon pressing key or when one of the 'won/lost' events occured. 4) Control keys : - shooting - moving the gun - terminate the program. To run the game, type: at the DOS prompt. Enjoy!