I know there's a guest at the end of the game but I think you should add more areas like a designated area for the guest maby a forest or a abandoned school. The guest will be in one of these places and will be really stealthy. One way to avoid getting caught could be when he is close to tou your screen will flash from black to gray to Wright or crows could be floating over your head or you know just a loud guest cooking noise. You could also add the hammer and boards to board doors like in the patch 9 of hello neighbor 2. One final thing you could add a board in the main home room that says guest mode and normal mode. I think this could come at the end of the game so that beginners won't be overwhelmed and it will be a little harder than the normal game so at the end if the game is a good spot to have it unlocked. That's really it tho I think it would be kinda cool