Would have given this game a spotless review. But unfortunately I've been told that it's in Beta and just there to prepare it for Google play. So what people do, they're playing it and giving feedback of problems to the Dev. He then fix it. That what we the downloaders are doing is called testing, in reality they call people that do testers and they get paid. Meaning one day you'll log into your game and you won't be able to play it anymore, as it will be Google's property. And the time and effort we as players has put into this?
So, ask yourself, would you be willing to download something where you'll just be used as a means to a goal? Then take it from there.