The game looks promising; it's a shame that it has remained in the early development stage.
It's understandable that, due to the lack of time, it has been left in this state, but I encourage you to continue working on it. You've already made a lot of progress (the building system and turrets seem to work quite well, although a more developed economy system could be added). If you're still excited about the project, I'm sure you'll end up making a great game.