Hey, you seem like the kind of guy who likes to find secrets. I just wanted to ask you two things: one, I can't find the Orange Guy in the Sky World; two, I can't find a secret in that world either... Can you confirm if there is one in that level?
Edit: Ok, nevermind about the Orange Guy, I found him. I really am blind :P
Still don't know about any secrets in the Sky Level though.