What is considered a therapeutic game? That term is too broad, for example, is Minecraft considered a therapeutic game? Since it could help people with such conditions; is Celeste a therapeutic game? Since it could also help people with depression / anxiety.
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