Don't get taken in by the pictures on the package, this isn't as good as it looks. As it's a conversion, I wonder if the screen picture really is taken from a Spectrum?
It's an alien zapper. Imagine a 3D grid coming towards you on the screen. The aliens start at the back and come towards you at break-neck speed, hopping from line to line as they do. Your ship, which can be moved across the screen at the 'front', is armed with only three torpedoes, but an unlisted numberof lazer lariats.
On the first level it's easy once you've got the hang of it, but as you progress, more and more types of alien appear, and you must avoid the space debris too! The concept is really good.
The graphics let this down. Not that they're bad, but they're certainly not state-of-the-Spectrum-art, being quite small and prone to flicker. As a result, the 3D illusion doesn't quite work.
Very good instructions, but that doesn't explain the price. Some budget games have smoother graphics than this. Rather disappointing.