This is a funny picture. I could see Heather doing this to anyone, not just Zoey.
To begin, the art is very well put together. The background is awesome. You did a great job on drawing the two females. Their outfits, anatomy, and personalities look as though this was an episode or a coming up episode.
Next, the shading is wonderful. I love that you went into detail with the background. It's not too detailed but it is like the show. Yes I do keep comparing this piece with the show because they are so similar.
That is awesome that you have the ability to make a piece of art that looks like it came from the show. Keep it up with the amazing art that you can make. I would love to write more critiques.