The following review is of my opinion. These are my thoughts after playing every single level, as well as finding most of the secret stars.

First off, Good game. It's beautiful, well-made...fun. But you broke my heart too --I got to the end of he fortress to find no boss... End of demo. I was like, "noooo, I need more! More!"

--The glitches hurt this game. Recheck your hitboxes on the jumping koopa troopers on the fortress stage.
--On the Radiance Reef stage (which you probably know about since these are obvious) but on both ends of the main underwater area, getting to the pipes, you either end up walking on invisible boxes or clipping into the wall. But you can't use the pipes.
--there are a few other glitches but I can't remember them all. I pretty much long-played this.
----Needs some story engagement. That will be a new thing that some games don't do. Maybe after collecting enough stars to unlock an important area, a skippable cutscene showing a "meanwhile" scene would be nice. Something that says NOT generic Mario. (that aside, you don't have to. It won't make this game less good)