I really like your concept
Should be very interesting to see
Also, your screens looks quite good. One thing, if I have to be a bit criticive, is you could try and ad some tiles to fill in the backgrounds rather than relying on the gradient. I think, per exapmle, a few hills in the background in the village would look really great.
But thats of course just my opinion.
Anyways, great work, and Im looking forward to seeing the finished level. Should be interesting