This IS very good. There is not so much I can say or suggest because the (small) size of it and the fact it already feels quite complete and finished.
Adding the extra light to represent fires and pillaging was an inventive and smart thing to do ! Also the chimney looks very good (because of the colors and the small hole in it)
from me for this MOC.
Maybe his eyelids were torn off to force him to look up into the sun all day, becoming very painful. Being in this state for a few days after which he slowly dried out, getting thin enough to nearly escape, but then sadly hanging himself in the process.
Cruel, cruel, cruel, cruel !!! I LOVE IT TOO, everyone can make up his own story !
1) The door: as said, make it look more damaged. Follow the advise given to you by Lord King of Everything, Mss. Phes and Erdbeereis1. Add some small brown pieces lying around the room.
2) Maybe you could add some fire damage, or debris from when the Alzheimer pirates attacked first.
PS: The broken wall is really a nice touch !
3) Adding another passive character, (like a parrot or bird on the roof) could add a (little) more "color".
This is, however, no necessity at all. I would try it and see how it looked.
Non-brick related advise:
1) Your MOC is build to be seen from this side. I understand that, and taking pictures from the other sides would be quite useless. I would take (and post) more pictures though, eg. zoom-ins of the treasure chest, the dead guy on the roof and the pirate.