Good point. I guess, on a very ground level view, all game concepts have more or less been around for years. It would be an interesting study of why this one went so big when so many others didn't.

Also, I was thinking of more of a blatant rip off. I'd imagine those rip offs that are already out there are going to see a spike in downloads in the next couple days when people go to find this game and it isn't there.