I really wanted to like this game, but there are far, FAR too many constraints on what you can do. You are limited in how much you can save, so critical upgrades are locked behind upgrading the vault over and over, which itself is locked behind upgrading other elements. The progression path is predetermined and agonizingly slow. The couriers are a massive bottleneck. The AI programming is miserable, so they need to be assignable. All in all, a decent start, but not worth paying for.