Wow. That was pretty nifty!! It took me some time to understand the controls and the level editor, but once I got the hang of it, I really enjoyed it. I think you'd need a way to filter player creations, though... because I predict some immature players would quickly take advantage of the freedom to make some disturbing "terrain" features. If you could add one thing of juice, maybe have sound and a visual effect when the ball lands in the goal. Overall, super impressed!!!