Instead of achieving all the buildings in the game by meeting there requirements, you can just help your self out and just use a cheat code to unlock the reward buildings and all the rest of the buildings in the game.
To unlock all the buildings in the games not including the reward buildings press:
Enter(then a box will appear in the middle of the screen)>type in Eureka>Press Enter.
And then a red box should appear at the top of the screen saying that all buildings are unlocked. To unlock all the reward buildings in the game do the same thing you did to unlock all the buildings but enter reward into the box and then the red box should appear at the top of the screen saying that all the reward buildings are unlocked.