Fun polished tower defense game. Don't think I've played one where you had to upgrade your real estate like this but it was interesting. I thought it was pretty challenging, I haven't been able to survive too long so far but I think I just need to play longer. That being said, if the idea is a switch between building mode to plan and battle mode, I think there should be some indicator of the enemies to come so the player can plan around it. Otherwise it becomes trial and error until you find the correct strategy which feels less engaging. Still a solid game, nice job!