I like that layout. It's interesting, and unlike dragon isles, the tileset doesn't give an illusion of space.
Actually, that's one thing I don't like about the water/lava/sludge tiles. They give the illusion of free movement.
We made an expansion and it is awesome. Really, you should check it out, especially if you're looking for some extra challenge.
Download over at ddmod.weebly.com!