I want to use rel="author", however the type of blog I run is about a game, and doesn't relate to my real identity. I'm more known for my screen name, so would this still be okay to use for the rel="author" tag? For example, if my Google+ account is for my user, and not for myself, could I still use it within the rel="author" tag? I don't want to get penalized in any sort of way.

My main reason to do this, is to improve click through rate, and just make my blog post sections look better in the searches.