Update appearing in Mac App Store for a Game I have never seen

Hi,

First time poster long time reader. Four weeks ago I converted to a macbook air 11" i7 8gb 128gig and I can honestly say, its the best tech decision I have ever made.

However today I noticed something odd. I recently added my credit card to my itunes account and have made 1 small purchase so far. In the update tab, there is an update for Nyan Cat: Lost in Space game, I have never seen this game before in my life. Did a thorough search of my comp and found no trace of it. Checked my credit card and have no trace of any purchases.

Anybody know why this is appearing in my update tab on the Mac App Store?

Thanks in advance.


Edit: this is my only apple device