Use the w key to increase pull force on the left side. Use the s key to decrease it. Use the up arrow to increase pull force on the right side. Use the down arrow to decrease it.
What I did is I took the right force and subtracted it with the left force. Then it moves in the direction of the force that is bigger. ex. Left:3 Right:4 4-3=1 Move 1 steps or... L:4 R:3 3-4=-1 Move -1 steps If it is negative, it will move in the opposite direction. So, if it is pointed in 90 degrees, it will move as if it was -90 degrees!