Hundreds of thousands of space aliens have invaded the atmosphere of planet Earth. They seek to eradicate all life and your task is to prevent a global catastrophe. Fly towards the enemy army and destroy his ships one by one until there is not a single spaceship left on the horizon. Be extremely careful and cautious. Your armor is stronger than the enemy's armor, but a few enemy strikes will inevitably bring down your spaceship and prevent you from accomplishing your plan. Don't let this happen. Good luck!