The theme of the jam is You are the Wrong Person.

The protagonist must be mistaken for someone else. The game must entirely hinge on this mistaken identity.

For example, they could be mistaken for an old lover, a famous person, or a villain.

The mistaken identity must be the main driver of the plot and source of conflict, instrumental to the story and the goals of the protagonist, not just something that happens in one part. The situation could be resolved at the end or not.

Have fun with the jam!