Have you pictured yourself driving a helicopter transporting some kids to a safe place?  Of course, this usually whenever a disaster strikes and that seems to be the scene here. The idea of the game is to transport the kids into the other town, where they will be pick up.  Transporting the kids isn't as easy as anyone thinks since the obstacles that you have to go through, ensures that it will be harder for you.  That is why you need to upgrade your copter everytime you got the money.  You can get the money from the floating coins in the air.  You'll also earn some money for transporting the kids safely.