Ok when I saw cowgirl in the title, I did not expect this!
Such a crazy design. How does she fire her guns? Does her hand end in the mouth of the unicorn? If so she got very long arm.
Also how does she walk like that? Where exactly is her feets? The way they are inserted into the neck, if she were to stand up straight it look so weird and not make sense.
However I'm critique an already weird concept, not meant to be taken seriously. So I don't know if it right to argue about correct anatomy. As for everything else it loom fine, like the background of a shootout in town. It seem like you had fun drawing this.