Well, I like it. It's surely not my vision of this tileset at all, but looks cool. I think the background blocks could use a similar gradient like the floor. I know I could do this myself, but with program you use you'll for sure make it better and faster than I in Paint. And corners should indeed be better, but looks like it's my fault by the way, as I forgot to make respective tiles in my own version. Overally great work, we can use it as a nice beginning.