Wow, these are really good. I rarely comment on tiles, but I like these a lot.
My only problem with these is that the window(?) and plant blend into the background to much.. or maybe the window doesn't blend in enough, I dunno. It's not clear whether it's meant to stand out, or blend in, because of the outline. It's just different enough to stand out slightly, yet too light to clearly make out the bottom part.
Also, I love the floors. XD