I got it this evening. Only had the chance to spend an hour or two with it so far, but, it's pretty fun.

Ugh, I gotta throw in a different game or play a VC game instead at some point....I just beat the third observatory, and it looooooks like there are only two more left.  v_v;;;  This is going to be insanely shorter than Sunshine was, even shorter than Mario 64 if I don't back off of it for now.  Gagh.

Well not two stars left, but two observatories left.  Which would by tonight be ONE left.  ;_;  Yeah, some of the comet challenges were cool...sometimes the colored haze(while cool technically speaking) is kind of annoying.

I finally played a level that met the 'minimum requirement' of my skill level I think: that Water Base hidden galaxy in the 'Kitchen'.  That's EXACTLY the kind of complexity I wish each level had at SOME point, and especially, it DID give that feeling I like, where you go on and on, and just when you feel like you're as far as you can go, you suddenly have to go farther.  Not TOO much farther like I would have liked, but it was unexpected and cool.  Just wish the levels before it had been as interesting or longer.

The Bowser levels I just *love*.  They're a little annoying, and the first is a little short....but it's like the one thing where I IMMEDIATELY get that 'Mario 64' feeling, not just because of the music, but the levels seem to be more in-tune with how the M64 Bowser levels felt.  *shrug*