Unfortunately, no. There is currently no way to reset your password unless you have an e-mail address registered. Nobody else can assist you either, the admins will not reset your password for you. If you have forgotten it and you haven't registered an email address, there is nothing you can do.
So, if you still know your password, go ahead and register an email address with your account right now. It is quick and easy, plus you get a shiny trophy!