The gameplay was good (if not a little bit too easy on even the later levels), but your custom level design program is too frustrating to use to its full potential. I believe i ran into a bug with your switches, where it would automatically be pressed as soon as the level began without anything touching it and configuring it took a lot of trial and error since I didn't know what the proper displacement was to let the pig go through. I wondered why many of the custom levels had no player interaction other than just pressing the play button.
Also, I did summit a level, but it did not show up under my "Shared Creations" tab in my account. Why is this?