The Apple Mighty Mouse has 2-D scrolling, but Black Ink only responds to the vertical part. If you have a Down word selected, scrolling up and down does what I expect. If you have an Across word selected, scrolling up moves right and scrolling down moves left. Scrolling left or right doesn't do anything, unless you accidentally go a little up or down. It would be nice if I could freely navigate the 2-D puzzle via 2-D scrolling.