1- What do you mean by freedom? From the looks of it, you are talking about how to traverse the level. Honestly, that's going to be a level design issue since it's a side scrolling platform. You can only go up, down, left, and right and you're also able to move a little bit farther and closer to a certain extent. From the gameplay videos that the developers show off, it looks like level design is good. The question is going to be for users to create levels. Actually, stuff like direction is something they'll have to plan on (among many other things) otherwise their level might not be as popular.
2- The developers have already talked about a rating system where you'll be able to easily find the top rated user created levels.







