I've got the feeling that this is an older version of the level. The switch at the end of the second half (section 3 in the editor) just destroys some used coin blocks, but nothing else. There is also a door in the beginning that just leads back to the hub (I don't know if this is intentional or not), and there are some sections that are unreachable.
But I like the part of the level I can access. It's designed nicely, and there are a lot of hidden things (like the moon).
I also liked the reference of rao the cow.
I kinda expect/hope that the boss will be jowey the poison cow xD