This is a fast, colourful game, making excellent use of the Spectrum's graphics and sound.
Your space craft (same as in Black Hole) moves around the screen, leaving behind it up to six gas clouds to destroy the suicidal anti-matter alien craft which are out to get your convoy of spaceships.
The keys are responsive and easy to use, but there is a joystick option, and using one makes the game easier to play.
Instructions are given on screen and insert, though I could have done with a chart explaining which were friendly and which were alien craft; telling them apart only comes with practice.
My solution was to simply destroy everything in sight.
An addictive game, with an increasing difficulty level to keep your interest.