You are the pilot of the latest hi-tech space fighter trying to save the Universe from destruction by deadly anti-matter aliens who are invading it.
You load the game by removing all cartridges from older machines - or hold Option on newer models - and then press Start while switching on the micro. Press Return and the game will load.
You move your ship using a joystick plugged into port one. Pressing fire will shoot your lasers which have a devastating effect on enemy vessels.
At any time during the game you can press Select to pause all action. Pressing it again will continue play.
The part I liked the best was the main title screen. Clever use of DLIs - display list interrupts - has allowed the programmer to create some interesting visual effects.
As budget games go, this one is quite good. My only complaint is that the enemy vessels move too fast and you can't avoid them at times.