I think it could do with having a bit of a side wall visible.
As for the flatness, just adding some cast shadows should help a lot! Don't forget that the building's front isn't just a flat surface, some parts stick out more than others.
In addition, I think you should ease up on some of the highlights and details, as they further flatten the image. If everything is fully highlighted and detailed, then nothing looks closer or further than anything else.
Don't forget to keep the lighting on your foreground objects consistent with the lighting in the background!
Here's an edit focusing on adding some cast shadows:
I got rid of the highlights on the bricks and the door*, and reduced the intensity of the highlights on the wood and thatch. I'm not sure the thatch highlights are useful at all, it might look better without them.
I made the wooden structure and thatch cast a shadow on the plaster, and removed the plaster shadows above the wood (what would be casting them?).
I did a very lazy job trying to flip the shadows, I'm sure you can do better than I did.
*I flattened the door a lot because it's made out of flat boards. There's no reason for it to have lots of shadows on each board. If you want to give it some wood texture, consider doing it with the edges of shadows cast onto the door (if there are any), or using some low-contrast colour that's neither shadow nor highlight, but a second midtone.
Something else I did was reduce some of your texturing on the wood, I made the shadows and highlights more solid by filling in some of the gaps you made for the sake of texture. This gives the logs more volume. Texture is nice, but you shouldn't let it get in the way of volume.
Edit: Didn't I critique the key icon and number being too close before?
