The harshest thing is buildings are decay every year. And its only 5 month in a year and to save buildings you have to spend people, and people eat food and I spend 6 years (and an hour) trying to invent all building and then I noticed that I have to gather 200 rarest recourses to upgrade main building or I can spend 20 to upgrade one production building. This is just spinning plates simulator, but every 10 minutes your fingers getting chopped. It's either very long grind or I am doing something wrong.