i see you've listend.
you're going up, as you've obviously listend to what everyone has had to say,but you still need more building areas, and the disasters should happen by themselves at random times during the game. have it so theres almost no limmit to what you can do. also difficulty levels, easy: fewer disasters, normal: medium disasters, and hard: lots of disasters.
hope that helps you out. i've also played all your other one before this, and you're getting there, keep it up, and yeah up-gradeable buildings too, they'd enable you to get the goals you've set, which i'd suggested to you, so thanks for listening to me.