Uber-hint: (you must be able to cross your eyes) Cross your eyes until both pictures are on top of each other, then focus on that picture. The differences will flash :D (It may also appear 3D. 3D movies and Stereograms work the same way)
Really, REALLY easy game.
At the start, just buy load of farms and as you get more happy, increase tax to 100% and food to 5.
Owned the squares at the end xD