you need to steer a special vehicle go through the underground dangers. When the game starts, you shall navigate your vehicle through the Siberia Underground. You need to watch out for the tricky gravity. You can press space bar to add thrust to your vehicle and release it before hitting the roof. That is all you need to do?Sounds easy? Remember to watch out for obstacles in the way. Are you looking for a good score? While trying to fly as straight as possible is a bit easier, it will not result in such a high score. Try to do some daring maneuvers to receive some extra distance. Good luck!