Use random and cases
have it where it was , basically have it where there is a radom number and if the number generated is odd, it is a perfect block, if not then it is
image3.Location = New Point(image3.Location.X, image1.Location.Y -2) or something, this way it is not able to block, this will allow some form of random blocks, also include speed changes to the ball, making it alittle harder.