Well, that's a cool proposal. It takes too long to earn enough cash for the upgrades, but seems like you've designed this to be an smartphone game. That one you will spend a little part of your free time and accumulate cash every day. Because of this, I think the game deserves an four. Not five because the upgrade menu it's too much heavily, a lot of texts, icons, arrows, buttons... But it's a very nice game. =D
 "Angry Gran Toss"){kind=icon}