One thing that I kind of get lazy about is collecting coins, may be good to have an upgrade for having a bigger coin collecting radius. But then again the game is pretty much perfect the way it is. I really do love it. Already I have rated it 5 stars.
This is what I dreamed for, might be fun to allow the person to gain points for every zombie he kills which allows him to get a temporary weapon like In Call of Duty Black ops
As said @Athang: from the main menu, click the gear then select "English"