Concept
The first would have been to try and create a new appearance by reshaping the grid. The form that I liked the best would have been to make the squares rotate around a centre axis creating a circular appearance.
The other idea was that rather than the shapes only covering the cavas, they could have coved the whole screen, but only been visible through the 'window' of processing. I think it would have been interesting to reveal things that only become visible once dragging occurs