The music and the graphics are beautiful! Very well done. Thank you for making this. I played for like 15 min :D where do I find the other systems? I tried like looping each planet and then going through. I went up and down XD Is it obvious?
It's designed in a way that when you get better at this and improve your score the game will unfold ;) You can try enabling flight path drawing in options it helps a bit, and also play in fullscreen, this way it should be easier to notice things :D