I guess that I joined this jam and also submitted my game there, not sure why I still couldn't vote ...maybe rating is just possible within the jam's section than directly at the itch-page of this game, where it could be played or added to someone's playlist?
yes that is the case. Just go to the jam site and set the filter to "most rated". I think this is the easiest way to find my game. Would be very thankful if you rated this game :)