Hi, thanks for wanting to work on some models.
First of all, a technical notice: our engine can only handle triangles. While most 3D tools can "triangulate" models, it often doesn't make optimal use of the triangles. Certainly for more natural objects, like animals. Buildings are more square by nature, there a triangulate operation can give good enough results. So for animals, it's better to design in triangles already.
Now, for the actual model, I find the body way too rough. It should be made a lot rounder and more organic. But you also should keep it low-poly. So there are a lot of triangles in the antlers that aren't needed (those won't be seen), and there are also strange triangles on the bottom of the animal.
Try to keep the model as organic as possible with the least tris possible.
But in any case, thanks for wanting to work on this.