Well, generally you'd want to have the horizon straight. The water clearly isn't running downhill, so it's very obvious that the horizon is not level. The Deer also seem to be a touch underexposed. There are also some red branches coming into the lower right hand side of the frame which harms the composition by being a visually distracting element.
It's nice that you got to capture some deer, there's a little bit that you could do to make this photo pop. Level the horizon for starters.