Very interesing. I liked game and menu graphics, very clean design.
One thing this game could use is some usability features. It would be great to have a visual layer for different tiles efficiencies, I had to click surveyed tiles one by one to find where is the best place for the building.
I'm not sure what dungeons do, I completed one but nothing happened.
Overall lots of potential, more interesting than many idle games that have only one resource.