Thanks so much for checking out the game!
I totally see what you mean by it feeling a little cramped. Perhaps in a future update we can look into changing some sizes around to make better use of the galaxy! er... screen space xD
So glad you enjoyed it! If you do decide to play more, feel free to share your high score that comes with the practice! Mine is around 60,000... but Josh's currently stands at a whopping 480,000! xD
-Sasha