The concept is really interesting !
I really like the music and the way it changes when you slow down/speed up time, the fact that you don't go faster, but rather the environment around you does is a bit confusing at first, but you get used to it pretty quickly.
I do feel like the moving platforms are a bit too annoying, but that might just be because I died too many times because of them in my first runs :D
Cool concept and good game !