Being a space fan, I particularly like your version of "Big fish eat small fish". And you are pretty realistic with some things: There are rogue stars out there. Also, the more massive they are the more blue light they tend to emmit. And on top of all of them: black holes of cause...
It just felt strange to "steer" my star around like a car in space or something. Being moved by orbital mechanic and gravitational influence would have been cool - and could nicely blend with the idea of your game.
Anyways, the good things are very good! Great job!