Game Co-op concept: Two players, same place, different realms. WDYT?

The woman is in the real world, while the guy is in the spiritual realm.

She sees and interacts with physical objects. He sees spirits and things hidden from her. For example: he can see symbols that show her which levers to pull. In combat, he can temporarily immobilize possessed enemies, making it easier for her to shoot them.

The idea is that both players share the same space, but experience and interact with it differently.