Fun, smart game.
I don't think it's fair to lump this in with all those tedious "art" games that don't hold up well as either art or game. It has some superficial similarities to those games, but instead of being vague for vagueness's sake, it tells a pretty sharp, straightforward story which I enjoyed.
I picked the alarm clock on every level, which results in a pretty decent challenge (friggin' birds). Once you get used to the jump and glide it works perfectly well. Here's a hint to anybody who's stuck: sometimes, you'll need to just use up your jumps so you can use space to glide and fall, glide and fall without worrying about your glides sending you upward. This aspect reminded me of the last level of the original Earthworm Jim. Anyway, this is a well done game!