You are flying a space craft? move it leftwards/rightwards and when the enemy's space craft is taken at aim fire at it until you exterminate it.

The invaders ships move leftwards/rightwards across the screen. Each time they reach its end they come one step nearer to your position. Your aim is to fire at them until you destroy them. At the bottom of the screen there are several defense walls that protect you from the invaders fire.... but they can be destroyed too if they are hit. At the start of each game you have five lives. Be aware of the fact that there are four types of enemies that you are going to eliminate. Some of them die at the first shot but there are strong ships that have to be hit 3-4 times until they are destroyed. A bonus-ship flies across the screen from time to time. Avail yourself of the bonuses that it will give you if you manage to hit it.

During the space battle you may get into dangerous meteor fields where you?ll have to cope with both the enemy's ships and the falling meteorites. You'll have to be very careful and avoid any collisions with them. To survive in this stage of the game just keep away from the meteors or shot at them precisely!

Advancing through the levels you?ll find out that the game is getting more and more dynamic, more and more interesting - with more and more challenges to be surmounted? Play and enjoy!