Not sure about your age, but by the desciption I would guess at least a bit younger (sorry if I'm mistaken). Just have to say KEEP IT UP! Amazing idea and I liked the gameplay and the whole idea of it. I would see that this could be something, add some powerUps, boss battles or something and for sure it gets even better!
I enjoyed that you could only for a very brief moment look into the dimension and had a cooldown on it, which made it more difficult. At first I really didn't realise what to do, so a small tutorial in the start. Could even be the main menu where you just say press space, and the play, quit, high score would show up and you would have to fly through it to start or quit or go to high score. It wouldn't need a proper tutorial but that way player would have to learn (You could have a bit more help for the player in that menu and it would make them straightaway using your game mechanics)