Extortionate prices to pay to advance, you're probably better off buying a games console like X-Box or PlayStation. I'm sure they're making huge amounts of money through advertising already so why the high prices to advance in the game? Its an app on a phone and does not justify the rip off prices. The only good thing about this is the old skool shoot em up game play similar to games the likes of Golden Eye from back in the day. As per say I'd rather buy a games console.