VVVVVVery cool game! (see what I did there?)
Art looks very nice, also game is very polished, story is fun too, and music sounds very good.
I would suggest making the pits that kill yu when you fall down them more noticeable than pits in which you can fall down without taking damage (some of them are a bit confusing), and also I would make the player able to change gravity with W or the up arrow too.
Other than that, I really enjoyed the game, good job!