It's looks like you're aiming for simplicity, but I don't think it has reached a good level of refinement.
This is quite difficult to critique without having a go personally, but I'll give it a try:
- The silhouette is a bit off for me, since I would have expected more length to the body, the horse has a massive rump, and the back legs are angled backwards for some reason.
- Are you trying to describe the shape with interesting lines, yet generating as few areas as possible? If so, I would probably get rid of the ear, and align the rear of the next with the front of the rear leg.
Personally, I would try to generate the shape of the horse as simply as possible, see what lines and areas are generated, then break apart the huge white areas by slighty reangling something, or adding a feature.
I also hate the animal you chose. I don't get what a zebra has to do with white shapes and black stripes.