Oh-ho-oh boy! Where to begin? Aside from the very smooth line work -that I've become more acquainted with your other pieces- especially on the hair(long, wavy, and lustrous!) and the kangaroo costume. Its just so.... right. It looks like it was made for her, and I mean "made" as in if it weren't for you putting this together, we would all somehow know by instinct that Lil Maci here was meant to be in a kangaroo costume. Its such an adorable touch. The same kind of touch that you've been explicitly known for.
As for the shading, it looks fantastic.. I can tell that the source of the light in this to be emitting from the right(our right, according to the screen). The different shades- I'm assuming a type of light brown or beige(whatever color color kangaroos typically are)- on the outfit blend well. The same can be said about her coat and the hair, especially those locks. As I said, "lustrous."
I don't know what else to add. She looks like the embodiment of what the concept of adorableness would look like if it were a sentient being.