You did something nice for someone this young ! Keep it up in the future. Here is a little feedback on your entry:
- I had issues with the camera, it was bumping in the walls. I think this is because the camera has to stay inside the closed environment you made. You can try to improve it based on what it is now or you could use fixed camera views.
- You need some ambiant lighting ! The main character is all black when seen from behind and it makes it a little hard to know where you are going.
- The music is really nice but i'm not sure it fits the game theme or the feel you wanted to give to the player. If you composed it yourself, then it's really good, otherwise check that it's a creative commons if you did not.