At the risk of these entries becoming little more than just updates into how many stars I now have, I’d just like to say “108 Stars!”.
Thing is, it’s hard to describe what levels I’ve done to get those stars for two reasons: the first being The Spoiler Problem, and the other is because when you play the game it all blends into one gooey fuzzy lovely experience, and I forget which planet was in which galaxy and stuff.
I’m running out of “normal” stars now though (that is, the first three for each galaxy). There’s a few left in the Engine Room and Garden, but pretty much everything else is a hidden or comet star.