Reach to the green zone. Then you will be teleported to the next stage of the game. There are three levels. At Novice level, you are the most powerful - you have more lives, bonuses and military than in the other levels. Bonus es bring high effect. Use "Z" button for primary fire, "X" - for rocket fire, "C" - for fugas fire. You also get the score after destroying the enemies and completing levels. Getting points, you get the lives. Use "P" key to start, pause or stop. Defense matrix bonus. Kills all the enemies. Shield bonus. You will be immortal for some time.