It should have been a flash movie, not a game
First off, the whole thing is very creative and interesting, it's a pretty good concept that has some dark undertones, so the storyline works. I even felt that the design aspect was pretty simple and minimalistic, creating a clean world that visually worked. There could be a game here, but currently there isn't one, which is why I suggest this would be a great flash movie instead. Just treat it like a walk-through hitting all the little info things, without the pain of having to 'play' the game.
It's hard for me to label this as a game because there really isn't much to play. It's a story and your only real goal is to get to the next part in the story. The only thing that resembles a game is bringing back the item to wherever you started. Let me assure you that was neither fun or enjoyable. Someone else stated that the controls should have been asdw and I agree 100%. The other thing that was difficult was the fact that you had two jump buttons. It needed to be one or the other because numerous times I would hit the up arrow by mistake when gliding, causing me to fall and miss my landing.
I really wish things would have clicked better, but as a game this really isn't a good one. It's a story that you've tried to turn into a game, but unsuccessfully sadly because it really is an interesting story.