Love this. May a recommend some kind of "disperse pieces to edge" feature/button, (or perhaps automatic behavior, flag-to-enable or not), so that when you zoom-out a bit, you can automatically "disperse" all the pieces to the edge or at least "equally space them" in the available space, etc.
I.e. the problem is a lot of time spent on moving the pieces off-of each other. While this is more pleasent in real-life tactile space, not as much fun when using the computer to have to click-and-drag all the pieces around (of course, sorting them etc, is up to the user, but just some kind of initial "see all the pieces in the space without them overlapping each other to the greatest extent possible depending on the total space avaliable given the current zoom settings" ...
I.e. the problem is a lot of time spent on moving the pieces off-of each other. While this is more pleasent in real-life tactile space, not as much fun when using the computer to have to click-and-drag all the pieces around (of course, sorting them etc, is up to the user, but just some kind of initial "see all the pieces in the space without them overlapping each other to the greatest extent possible depending on the total space avaliable given the current zoom settings" ...