GameJolt probably does a similar thing that itch.io does where it adjusts scores based on how many votes they get above/below the mean of votes per game.
oh, duh. yeah, it explains it right there in your screenshot. it’s a weighted average.
Check the screenshot again - there's a user rated category for "overall" similar to "graphics" and "sound" as well as the computed summary also called "overall". I think that broke the back end where it sorts entries by "overall" score in the parent page listing.
