Magnetar

The game will give you several magnets which stay randomly in the screen, and your task is to move everybody to the gray region in the center of your screen. In the beginning, you can move only one magnet; however, when the north pole and the south pole of two separate magnets are next to each other, the two magnets will be conjoined together, so you are capable move more. You can also use the magnet you can move to push other magnets.