For the game jam, the game score is determined by using a statistical technique called the Bayesian average. This means that when calculating a game's score, the number of ratings it has received is taken into consideration. For instance, a game with a single 100% rating will not necessarily get a higher score than a game with multiple 80% ratings.
Basically, the Bayesian average method ensures that a game's score reflects the collective opinion of a larger number of people who have played and rated the game. So, even if a game has high ratings in one category, like graphics or sound, it may not necessarily have a high overall score if it has not received enough ratings.
This is why you may notice that the rating averages in specific categories do not always align with the game's final score. The final score is influenced by both the average rating and the number of ratings received across all categories.