Well, it took me a little while to get the hang of it, but once I did, I caught on pretty quick. What I hate, is first off, the name fits "Stress Ball". It will have you stressing about getting the @#%$ ball to not fall off the edge. I would rather have the ball take some 'damage' or something instead of falling off the edge making me start over. If this truely is a physics engine, I would like to see maybe the ball gets chipped or something instead of falling off (change edges into spikes or something). Then it sort of hobbles while rolling. But making people start over again because of ONE mistake is stupid. People will hate it.