2XXX year.
Ozone layer in the earth was destroyed.
Thus, it was the worst of the situation in which space dust called space debris comes constantly falling to Earth.
Space debris are said to be 5 trillion 800 billion pieces there at the time in 2015, it had ballooned as not can also be measured in the 2XXX year.
Mission to destroy all the incoming space debris toward the Earth to many people, including you has been made.
This game is you can crash satellite each other by a head-on collision, shoot down the satellite you are too close to the Earth would have been pulled by the gravity game.
If you shoot down a satellite that crashed contains the reward, but the compensation will occur and shoot down the satellite that normally have orbit.
Your mission is and falls in the area are you in charge of the satellite is one piece also will be failure.
Since the bullet is fired when you flick the airframe, please observe the Earth is hit on the object that crashed the bullet.