Hey, I named a level like that in LWT! ^^
Just kidding, there's no copyright on level titles, after all.
Though I'm a little curious: Are you planning to pre-release every single level you make? I don't mean to stop you - it's just that you might find that, when you finally release the complete pack, interest might be somewhat lower than in any other freshly-released pack, because a lot of people have already played every individual level piece-by-piece.