Pretty good game. But like most this will turn out to be PAY TO PLAY as you get higher level. It's already slowing dramatically and if it keeps doing so I will drop it in the can. BOOM! Update: been playing for two months now. It's getting harder to finish levels, definitely taking longer. Which means boring. That or pay money? NOT!? I'm clearing out level 18 now and it's taking x3 days to do so. Not enjoying this game at all.