What are some free games similar to World of Keflings?

I just beat the game recently and for some reason it was so fun. I'm wondering if there are any FREE PC, iPhone, or xbox games similar to the game. I like the simplicity of it, unlike sims, and I like the cartoonyness of it as well, if that's even a word. I like placing the little objects to create the buildings and giving the little keflings jobs to do.

Clash of Clans