Fly your Hoverjet, through the caves, to the finish line as fast as you can while picking up gems to earn maximum points. If you get low on fuel then top up from the green fuel cans. Take care, if you bump into the cave walls (or other surprise obstacles) then you can damage the condition of your Hoverjet, too much damage and your craft will explode! Completing a level, by reaching the finish line, will win you extra points and open up the next available level. If you are too slow getting to the finish line then a door will close preventing your escape and ending the level. Even more levels are available as an add on update.