The game play is simple and challenging - survive for as long as possible while at the same time getting as many points as you can.

You are stranded on one of Jupiter's moons and the native Lunar Crab population don't take kindly to you being there.
Scurrying about, they continually spit green goo at you whilst darting in and out of the rocks.

The screen is presented in 3D with sandy ground in the foreground, running away to mountains and hills in the background.

You can only move left and right, scrolling through a large landscape, and firing off into the distance with your laser canon.