Good in a way
Well I would rather draw in Photoshop, but this was good because it gave a drawing tutorial. Also, this was very well done from a coding standpoint. I noticed that you can make thicker lines by moving the mouse faster. But I also have some comments on that. Although it's a good idea to be able to draw thicker lines, it makes no sense for the line thickness to be determined by how fast you move the mouse; although there really isn't any good way to detect sensitivity with a mouse.