On the first level your aim is to destroy the six alien fuel cells at the top of the screen. These are shown by 0. You must also avoid the saucer which follows your movements.The only way of avoiding it is to shoot it down or hyper spacing out of the way.

When you arrive at the second Level you must shoot down eight birds. There are two birds at a time and eight or these must be shot down in order to get on to level 3. In addition to that you must avoid the saucer and meteorites as in Level 1. The birds are ghosts and work together. They flash alternately to try and trick you. The birds are harmless to your ship.