I remember playing this game about 10 years ago, probably would have been played on Acorn computers (may have only be in UK). 2 space ships, on opposite sides of the screen had the aim to hit each other, though the 1 factor being the shots were greatly affected by the gravity of the planets in the way. So you had to angle your shot to use different planets gravity appropriately. Your shots could also eventually make a hole in the planets. Has anyone seen this game, either on or offline? Or, does anyone even remember it?