Changed the way the view controller handles user touch - i am now displaying a UIView (a square at the moment) that has UIKIt dynamics behaviours attached to it - it has an anchor point in the middle of the screen, (trying to mimic having a centre of gravity in the middle of the screen), and has collision behaviours with the borders of the screen.

TO DO - Completely change the previous way of handling touch events (UIBezier path drawing etc) to the new one, and enable velocity and gravity direction from the user swipe.