Really nice game. Obvious the devs care, and I can't find any major flaws since the interface lag was fixed. Changes I would like to see - Achievement notification doesn't cover donuts, a 'purchase max' and 'purchase 1000' option, a way of seeing your overall income per second, and an option that would prevent you from attempting to purchase 10/100 of a building when you can't afford it. This is mostly just convenience stuff though, so not a 'real' flaw in the game.