Cool game! I managed to complete it on the second run. I tried a bit around and had the impression that the 2nd and 3rd week are the critical ones. After that it got easier for me. I would say it is well balanced.
The graphics are a bit inconsistent. Partially high-resolution, partially pixel-graphics. I would prefer if my workers and warriors would walk around in the (very nice looking) town.
Overall I found it very addictive. Really well done!