Hey guys,
Just wanted to jump in confirm that the "Toy Box Game Maker" is infact your new BFF when it comes to protecting your creations.
Placing it in your box won't lock everything right away, but it does allow you to save it as a toy box game. (Like Lauren said, when you enter the "save game" screen, tap the right shoulder button to switch from regular saves to "toy box game saves". When you submit to Disney, hit the right shoulder button again to access your "toy box game" saves.
I prefer saving a version of both when I save - a regular save and a toy box game save.
If you enter the properties of the toy, you can adjust enemy difficulty, in addition to enabling or prohibiting the following (it prohibits all as a default):
Editor Mode
Magic Wand
Logic Editing
Toy Customizing
Toy Moving
Toy Deleting
Camera Cancelation
Hexagonal Power Disc Use
Editor Filters
I very well may have just repeated what others have said here, but just wanted to let you guys know there is a way to protect your creations if you wish to do so. I'll try to check this thread throughout the day if you have any other questions!