The aim is to drive from the beginning of the track to the end while avoiding obstacles and eliminating (with your machine gun) other vehicles. The tracks are not roads, but maze-like obstacle courses in the wilderness. It is part maze solving, part combat, part racing against the clock.
The cover art pictured is not from the original release, but a 1991 reissue on the Pocket Power label. This company, a division of Prism Leisure, re-released older games (including many from Hewson) in small packaging with a cut to open. The big deal was the price - at £2.99 they cost barely 1/3 as much as most budget games, and a fraction of full-price game costs. Add