This one took some getting used to but I ended up really liking it! I think with a bit of refinement of the mechanics this could be a really addicting game! It reminds me of matching games like 2048, but it's also got far more advanced spatial optimization. It might be helpful to make the beginning a bit more streamlined, since it took me a while to figure out what to do, as well as what the loss condition was. It also might be worth making the spawns of new buildings be dependent on moves rather than time, to enable the player to employ more strategy towards the end, instead of just frantically rushing to clear the borders. Overall, I had a ton of fun with this game so my suggestions are more minor.