This is incredible! 0_0
I'm making an Open-Source Civ V for Android and your tileset blew me away!
Even though the art style I've used up till now is decidedly non-pixelish, the map looks absolutely stunning now:
I modified one of your "marshy" tiles to create a "lakes" tile, and created 2 "Jungle" tiles (YMMV), putting them here for future users
Obviously credited you and put a link here ;)