As its title suggests, this is an arcade type game in which you zap aliens in order to survive.

The cursor keys control movement of sights which must be positioned on the aliens that flit across the screen. The space bar is used to open fire.

The object is to destroy as many aliens as you can, before you ship's fuel runs out. The fuel reserve is displayed at the top of the screen and rapidly diminishes as the game progresses.

To completely destroy an alien the head must be hit, but hitting the body gains extra fuel.

Adding to the difficulty of this, however, the aliens appear in pairs, one of which will act as a decoy as it cannot be destroyed. At the end of each game you are reminded of the score, but no best score is given.

The action is extremely fast, and unless you're a whizz kid of the keyboard, each game ends within a few minutes. If a selection of skill levels were incorporated into the program I would definitely find it more playable.

J.W.