Beautiful! I really like the labels and colors. I think I might even like this version better.

If you're going for a very "clean" look, you succeeded. If you want it to have more "realism", you could try applying more texture to the farm fields and water areas. I especially noticed the difference between this version and the full color version in regards to the river. I really like the blue river and ripples it has in your Challenge version better.

To me, it is an interesting hybrid in appearing between hand-drawn and computer-drawn.