This is a backrooms map that I have created with most of the levels included. Most of the first levels you start out on are kind of mid and then you get to the better ones. The texture pack messed with some of the textures because I had to change some of the textures of other blocks that I had already placed for the earlier levels back when I did not have a texture pack for it. Download resource pack: Backrooms Texture Pack Minecraft Texture Pack (planetminecraft.com).
I recommend you download this because it looks really bad without the texture pack on some of the levels.