If you shot vertically, you would have captured the top of the door, and kept the same scale of the child in the image, and magnified it's smallness. I don't think the "extra stuff" on each side of the image add anything to the story here.
A great tip that was given to me a long time ago, is to shoot everything both horizontal, and vertical, so you have options later. Often we can't go back for a redo, and doing this gives you something to work with.