OK, here are all my issues after a few minutes of observation:

VERY IMPORTANT
-Perspective, the table, sofa, and stairs are partially topdown, while the character and walls are not.
-The yellow wall and the window offset the dark atmosphere. Keep a eirie atmosphere in mind while making tiles and you will get a better whole image.
-Contrast, needs more. (Just about everywhere.)
-The character's shading, its a little banded.
 
LESS IMPORTANT:
-Doorknob needs a spectacle, Its very hard to see.
-Holes in boards should not be the exact size of a board, its makes it seem deliberate and ruins the unerving feel holes create.
-Needs cracks around the holes in the walls, I don't see how it could break so perfectly.
-The boards on the window are WIP right?

NOT IMPORTANT:
-The stairs kinda go to nowhere, eh? 
-I don't think this is really cyberpunk..

     Your main issue in your pixeling is exactly what mine was, too little contrast and improper shading on alot of detailing. Not that there is anything wrong with heavy detail, but if you force yourself to work on more simple shading you will eventually carry over what you learned by doing so to your detailed style. By simple shading I mean you should work on creating objects/shapes with few colors, this will teach you proper color use, contrast, better shading, etc. Observe other pixel artist's works that have few colors/limited palletes.

Neat tiles, I like where it is going. I want to play this game!