That, I think, is what separates truly addictive mobile games like Temple Run from the not-so-fun ones. You might say the best mobile games create a routine that's fun even through repetition; that re-doing what's ostensibly the same task doesn't dull it. That reminds me of the quarter-sucking arcade games of yore, but it also makes me wonder about the future of mobile games. Right now, developers are looking at mobile games and deciding what it is that keeps people glued to them. Once they figure that out, it opens up some room to experiment. Emotional depth isn't what I play mobile games for right now, but maybe, once developers know what hooks us in, they'll create mobile games that move us, too.