I'm surprised to say that I agree (because I'm usually not a fan of flagging). You need X amount of karma to even downvote people on HN. There should be some participation bar to post a game ad.

With that said, if the author wants to submit a blog entry detailing some design/coding problems solved or description of his process in building the game or even a link to his sources, I'd happily upvote that story. But just a link to the iTunes listing of a game from a relatively new account is something that can be abused.