The idea and the presentation are both really really cool, but I have to say I was a bit overwhelmed by everything. Simple tooltips when you mouse-over the buildings telling you what they do would have been nice, and would be enough so you don't need a proper tutorial.
I'm sure you know that, but sound FX could add a lot, not just in terms of polish, but also to warn the player of new information coming in (aliens are attacking, one of your resource is depleted, that kind of stuff).
As a quality of life feature, snapping the buildings together so you don't have to manually find the closest spot possible to existing buildings when you place a new one could be really cool.
All of those are little things that could be improved, but they're not enough to bring your game down. It is an excellent idea well delivered, and it doesn't need much more to become truly great!