Has potential to be some sick cover art! I would watch your perspective closer, Alexis's distance between the horse is flat and it makes it look odd when she is stepping behind the horses hoof. Also the chest is off, I cant tell if that's a horse jumping out of her pants or if it's apattern of a horse on her shirt. To improve that I would study wrinkles in clothing by hanging a shirt on a chair or crumple it up and set it somewere and try to draw it. Alexis's hair looks seperate from the flow on the bottom. it seems you should study anatomy closer. it's full of muscle flaws in terms of porportion.
your startin to develop some good solid lines and you have deep imagination. keep it up!