In the jams description it says this:
The rating period will last 3 days and games will be rated on the following criteria:
Fun
How does the game feel? Does it have a satisfying gameplay loop? What keeps you playing?
Visuals
How does the game look? Is the art stylized or refined? Are there 2,147,483,647 particles on screen at all times?
Audio
How does the game sound? Are there quality SFX? Is there immersive music?
Theme
How does the game interpret the theme? Do the mechanics feel rooted in the theme?
Weirdness
How weird is the game? Is it unapologetially strange and interesting? Does the game feel human?