Your character has been wreaking havoc on the enemy while behind enemy lines. Now they know where you are and they're going to do something about it so you have to get out as quickly as possible by running and gunning. Use "A" to slow down and "D" to speed up. The space bar will allow you to jump and the mouse is used for aiming and shooting. Be careful though, because if you slow down too long, the nuclear shockwave will kill you.