The moment I reached level 14, I was overloaded with possibilities and quests to buy new factories, trees, animals and what not.
Since then 90% of the orders are impossible to fulfill, and even aborting them only results in getting new orders with the same yet impossible items. How am I supposed to generate enough coins to buy new factories, animals and plants to eventually fulfill more complex orders, and to receive materials to expand as well? This takes a lot of fun away. I remembered how this was the exact reason that I deleted Farm Story from my iPhone a few years ago, but I'm sad to learn that on that matter nothing much changed. :/
I wonder how people get far in the 50s~70 levels without spending a fortune on diamonds.