A burned out sky, which is very noticeable. It attracts the most attention and not the focus, which i think is the green door. If you would have nice sunlight falling on the door, it would attract more attention, because the sky would probably not have been burned out. Also it would have given a warmer feel to the image.
The green door: maybe it has an interesting structure, but i can't see it because your image is too small.
Composition: the door is nicely put, but i can't see the fence sufficiently to get a sense of depth around the door.
entirely too small. very sorry, but this would be so much better if it used all allowed pixels. will not vote down because of it. if you need any help knowing how to take advantage of the full pixel size, feel free to PM me.