Very well done.
-The music is pleasant and unobtrusive.
-The levels are well designed and took me multiple times, and usually lead to that "ah ha" moment when I realized what I was supposed to do.
-The game art is cute.
If I were to change anything, it would be that the shuffle sound is a smidge too loud, and the art might look better if it were a little more saturated. (And those are honestly just subjective preferences)