I am trying, unsuccessfully, to track down the first computer game I ever played. Old DOS game, similar to Space Invaders but even lower tech. Played on an old CRT that only had green text, you had a ship that went left to right along an arc(higher at the sides, lower in the center), well shooting the enemies that came down from the top. I remember it being called 'BATS' or something similar but I can't find it.....