Thanks for the comments. I'm pleased to know that you appreciate this series or at least are intrigued by it. This motivates me to work more and try to do my best, so thanks, really (also that Europe masterpiece looks like an awesome project, MP3 :3).
Also I just wanted to say I edited the first post to include Yuri's and Harmless' levels in the series. Hanging Citadel will be located right after Ghost Depths because from what I've played, it will be harder than your average SMC level and where it is (8th level of the series), it's like one level away from the final level(s) (where I consider the end of the series, aka. getting to Bowser, starts). So that should be cool.
Also I heard you like logos
Here are some for the planned levels that didn't have a logo yet.


On an unrelated note, I have decided to remake Neon City Act 1. Current level will be removed from the series and its name will be changed to something else (like Big Apple or something), if not removed entirely (but I'm not a big fan of that option). New one will be a lot better.
Oh and map will be updated later.