My original problem I am trying to solve is my enemy ships stick to my player ship and do not bounce, even though the movement is set to bouncing ball and I have set them both to bounce.. So I found on the forum that I could use Physics bouncing ball, but when I put the physics engine in my play level, and try to run it, it goes for about 2 seconds and then crashes and a message about an error and windows is looking for a solution to the problem. I found one common post, but I didn't understand the solution which had to do with two actives overlapping one another and that moving one up a pixel solved it. I have no idea what this means. If anyone has a suggestion I'd appreciate it. Thanks!