You have to guide your small starship along the roads through space. There is a gauge that shows how much fuel/oxygen you have left in the ship. Along each road however there are obstacles such as big blocks, tunnels, or big gaps that you have to leap over. You can also change the speed of the ship by simply using the up and down arrows. A nice little game if you have a bit of spare time, and also a lot of hand to eye co-ordination.