The narrator is a nice touch as was the tutorial, though it didn't make it clear how the game loop functioned. I wasn't sure if jumping was causing the level to update or if it was something else, I got that it was when you completed it, but from time to time the level updating was fairly delayed. Audio and art was nice, and the general concept of the game is strong. With some polish you'd have something really special on your hands I reckon. Overall though good stuff!