It would be nice if the camera was zoomed out a bit more. Sometimes when I jump off a ledge I'm taking a leap of faith because I don't know where the next platform is (if it's positioned below the camera).
Also, the player feels a bit heavy when controlling it. It feels a little cumbersome to control because of that.
Of course, names for the powerups and more instructions as to what is going on would be nice as well.
Otherwise, good work on this! I see potential in this game, there's just a few minor things that need fixing to make it truly great :)