God. The Kirby no one wanted...
Love the expression. I think the values could be tweaked. A good way to check the values of your work in Photoshop is to make a new layer on top of all the other ones and fill it with black. Set that layer's blend mode to "Color" and you'll have a quick way to check values. I'd also give the saturation more of a punch. Though you posted this in 2015 so perhaps you already know the stuff I just regurgitated.
Really like it though, a splendid first post.