The decline is visible over the whole year, and that includes four weeks that correlate even at the very end of the year, those weeks all have over 10% decline, which is somewhat better than earlier in the year but still indicative of a decline.
NSMB could turn that decline around all right, but we have to wait until more numbers turn up before we can say the decline has reversed.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.