Mat I suggest some improvements:
1) Display the unitary and total cps/time for each building
2) Add some kind of crank to 2x multiplier that pops up temporarily when the app is open, so its fun to crank even after cranking is no longer effective
3) It would be cool to show the still not bought buildings one by one, instead of opening them all, so it would always be a surprise to know what crazy contraption the next building will be