Are the games meant for mentally ill people or are they to bring awareness? Or something else?
While Minecraft and Celeste may result in therapeutic experiences for many people, they likely weren't designed to be explicitly that. The games in this jam are meant to be intentionally designed to be both fun and therapeutic. As GGJ has posted before, this page gives a very good overview of what they're looking for:
https://www.deepwelldtx.com/post/discover-game-jam-mechanisms-examples