You have four basic controls: two to turn your ship clockwise and anticlockwise and the fire and starbomb controls. The fire button will destroy the Workers and Warriors, whereas the starbomb is your only defence against the mighty Deathstar.

A collision with either a Worker or a Warrior will cause no damage to your ship, nor will colliding with a Planetoid.

Initially the objective is to fly around each Planetoid, spraying it with bullets until it starts to emit glowing Crystals. Then you should fly over the Crystals to pick them up - each Crystal is worth 200 points and gives you a Starbomb.

Your opponents are the Workers (coloured red) and the Warriors (coloured blue).

The Workers have several tasks to perform:-

• waiting near your ship while you mine Crystals,
• waiting near Warriors as they mine Crystals,
• pursuing free Crystals and transporting them back to the Deathstar.

The Warriors' main jobs are:

• mining Crystals,
• guarding the Deathstar,
• attacking your ship.

The Deathstar is built in one piece at a time by the Workers. When 20 pieces are in place, the Deathstar is complete and the screen will flash different colours to indicate its attack is imminent.

A good strategy is to collect a full supply of 24 Starbombs, find the Deathstar by releasing a Starbomb and following its path (the Deathstar will appear on the radar screen), wait for it to be completed, and then run away from it releasing Starbombs whenever it is on screen with you. Also ensure that you shoot any Warriors that are on screen with you, as they can shoot you. The Workers which collect the Starbombs may be shot to reclaim them. If you successfully destroy the Deathstar, you progress to the Worker Zone, the Warrior Zone, the Planetoid Zone and the Void Zone (in which there are very few Planetoids present), with a bonus screen between each zone.

When viewing the radar screen, which is shown at the top of the game screen, the game characters are shown as coloured blocks as detailed below:-

Your Ship........White   Warrior.........Blue
Worker...........Red   Deathstar.......White

Z - Rotate Anticlockwise, X - Rotate Clockwise, RETURN - Fire, SHIFT - Starbomb
COPY/DELETE - Pause Off/On, ESCAPE - Restart game