O.K. here's some contructive critizism. Your a preety good mapper, as I can tell from your request forum. However, rooms aren't hard at all. I learned nothing new about rooms. You made a skeleton of the room, then you cluttered the room up with things. That's all. You can do a better tutorial than that. Let's see one about puzzles, or cities, like someone else suggested. Caves will proze how good of a mapper you are too.
Does that sound harsh? I'm sorry, but it's true. I have mapped better rooms. but they were important rooms, with strict goals in mind.
But keep writing, you show promise.