The graphics are fantastic!
The scene almost empty, the effects and the calm music helps build the mood, that seems to be hope that you will find something different and then disappointment!
I enjoyed very much playing your game!
Some improvement points:
-I was not sure how the gravity would affect my launch, so It would be nice to have some visual aid;
-The tutorial could be better if you had a simple first level where you present the mechanics, and visually show where you should go.
-When you zoom out, the stars start flicking like crazy, not sure if it is a problem on the game or my screen though.
One last thing: you should polish it and publish as a full game, It feels really good.
