You've posted a bunch of disparate elements which look alright in regards to the style you're imitating, but we haven't seen how these tiles collide together to give us a cohesive impression of a room.
For example, you haven't posted any walls yet. I'd say the most important part about creating an interior, is nailing down the walls, ceiling and floor tiles. Make sure they have an established priority that imply planes of depth. More importantly, they have to mesh with the character and maintains a relationship in which the main character is easily readable, but doesn't stick out or blend in too much.
One approach to doing this is to have a character with a color that stands out, which your yellowish brown certainly does. However, you have to make sure your floors, (right now the wooden one is pretty bright) doesn't grab more attention than the character, or any of the sprite level. For this reason it would be beneficial to have the floors relatively low contrast, I would change the color that it is now to maybe that darker shade of brown.