Mapper: pixxlycube
I could not decide for one joke, so here are all of them delivered in one sentence:
It does not matter if this is the song you recognize, but fact is, that if the developer itself struggles with it, he may as well have his extratone license removed. Definitely no gatekeeping here.
Oh also difficulties range from Normal to Expert++. Yes. Enjoy Pain(tm).
Fun Factor0
Rhythm0
Flow0
Pattern Quality0
Readability0
Level Quality0