Lovely entry Majek, the image quality is just fine.
It's small, but it packs a great amount of detail into that space.
I'm not completely sure what the cabinet-like thing is on the right, but I think the usage of the crate piece is excellent.
As far as I can tell, it looks like you used brown doors like the ones used in the Dwarves Mine in some parts of the wall, which I think is a brilliant idea. Thy provide some great texture to the wall. Lastly, that little plant caps the whole thing off with a cute touch.
Some improvement ideas:
1) I always feel that a MOC needs to have some sort of a minifigure to really come alive. Adding a captain character would be a nice touch.
2) The black treasure chest blends in a bit too much with the floor. If you have a brown one I think that would be better suited for the spot.
Excellent entry all around, certainly one of the best so far. Good work and good luck!