Your ship automatically flies left, while you control the up and down motion.
At first, you must shoot the larger, red ships but avoid the smaller, blue missiles. Do not shoot the black ship, you need to dock with it so you can land and refuel later.
When you reach the three enemy fuel depots, shoot each one to destroy it then make your way through a mine field to continue. If you come to the landing strip, align your ship with and a truck refuel you.
In the dark you cannot see the enemy ships. You can fire shots which create light.
An interesting shoot em up – especially when the screen would darken and the baddies would disappear