First off, excellent presentation. Not just the pixel art, but all the little details. How the camera moves from one building to another between turns, all the overlay effects, etc. Also I think this a great idea for a game. I'm into 4x games in general and would love to see how you could expand on these mechanics.
On the down side, you need a hefty tutorial section. These mechanics are way too complex to just throw the player in. I spent most of my time fumbling around. But I guess those are the limitations of a 48h game. Good job!