Beware that there's another game called Rockdodger, an open source title that's been around for a while. It's different from yours, apart from the name, but still. You might want to do something about the potential confusion.
I don't think name confusion should be much of a problem. The other game is on another website, in a different engine, the name is stylized differently, and was released three years earlier. Despite this, if any name confusion is apparent I will find something to do about it.
