When a city levels up, the game asks you to pick which bonus you want to assign to it. But if you dont remember each town crystal clear, then you are forced to choose between say, tech and arcane knowledge. Then if your guess was wrong, and you assigned gold bonus to a town that produces tech, then you have to rollback to an earlier save to pick the right upgrade. Maybe dont lock the screen when the upgrade window pops up so we can click on cities and verify which upgrade we want.
