A friend looked at my game, and remarked that something was a bit off. After we deliberated on it, he found it. The stars weren't white in center. This posed an interesting problem, in order to have a white center, I can't just use a grayscale star bitmap, then shade it a certain color, because that'd lose the white center. So I had to draw different stars, one for each color, and render those instead.
I'm not good with pixel art, but I'm proud of my star art :) I realized that I haven't posed any screenshots in a while, so I'll show the current "New Game" screen. This is what the new game screenshot looks like, with a ring galaxy.