There is no real meaning to this game you're just clicking buttons to upgrade things that you don't even control! I was convinced that I had missed something and was stuck on a kind of in-between lvs screen,I continued to PLAY??? for 2hrs at which point I decided I'd just had enough!!! And now after reading some other reviews I'm sure that I wasn't missing a different kind of gameplay, VERY VERY DISAPPOINTING only reason 2stars was for graphics