You could include some more screenshots, preferably of it in-game. The colors are vibrant, but I think the smoothing makes it look very different from the existing ones in the game. You could "dirty up" the texture's shading so it doesn't look so clean. Also, the shading is very uniform across the textures; it feels like everything is made of the same material. The face is perhaps too dark; you could add some lighting to brighten it up a bit. It's a very "cakey" color palette. Although, if that was the goal, you achieved it. This is most noticeable in the horns and the decorative fabric of the saddle; it feels very homogeneous with the rest of the texture, even though they're supposedly different materials. Even so, it's an original design.