Very nice idea, but I think implementation lacks here slightly in a few important aspects:
1. Your main feature is to make people talk and cooperate so to emphasise that I think your game should be pretty simple when played alone (seeing everything) but become hard when played as intended. To make that you need for example to increase view radius for the opposite player.
2. Player control is slow/unresponsive
3. Second level seems impossible. I read in other comments that there are elevators and I think I know where they are but the game doesn't introduce player to elevators and I wasn't able to trigger them
Check out my game (3D-horror) as well: https://nns2009.itch.io/love-full-house