gdpr – A consent message for cookies is needed for the best score of the web game?

I am creating a word game online and I wish to use a cookie to record the best score of the user so that it is always visible when playing the game, and not just for the session. In order to comply with EU RGPD, do I need a cookie authorization message for this? It will only store the best score, no name, email address or anything like that.