From Videogame Morgue File

Anti-Aircraft was an Atari Inc release from 1975. The game is for one or two players, shooting artillery guns as passing planecraft in order to score the most points within the time limit. Guiding the angle of the gun with two buttons located beside the firing button, the turret fires within an approximately 30 degree angle pointed at the sky. The projectile must be aimed and timed to properly hit its moving target.