I really like the atmosphere of this game - the long shadows and changing colors and the strange music make me think of a dream-themed level in an old platformer.
Other people have mentioned the start of the game (with the white screen) being confusing, but I think my other critique is that, towards the end of the level, the scale has changed so much that it's impossible to see our sprite (we have to guess our position by looking at the shadow), and the platforming feels several times floatier than the already-floaty beginning.