This game is in the Scramble genre, your task being to pilot a space ship down a cave scrolling right to left. Shooting alien craft and fuel dumps yield you points.
As the opposition does not fire back at you, the game is really an obstacle race. But you also have to bear in mind that your space craft has limited fuel, forcing you to dock with mother ships in order to keep up your supply.
A nicely conceived game with nice graphics, but spoilt by two serious faults.
First, apart from the scrolling routine, the game is written in Basic, and all movement is slow and jerky as a result.
Secondly the program has a number of bugs which result in portions of the display vanishing and other odd things happening.
Sorry, Lyversoft, but against the large amount of machine code opposition this game doesn't stand much chance of success.