You need to give the walls and ground a lot more variety in colors and details, I know its a work in progress, but keep this in mind for the future. If the player is going to see these tiles a lot, you have to have variety, otherwise they will get bored. For example, you could put banners, rugs, tables, signs, books (on the ground), pieces of wall missing, or even glowing eyes in a hole in the wall. Just some ideas, but it looks good!