In terms of richness of gameplay, Farmville is closer to "click on cows and win points" than to Sim City or Roller Coaster Tycoon. It may be closer to those in terms of graphics and the diversity of choices you have, it's just that those choices are not very deep (you won't need to balance any feedback loops or anything, you can just put anything that looks pretty).

And of course there's the actual Cow Clicker game.