A house-based psychological horror is always excellent fodder for a game idea, and I love games that explore how the limited sanity of the player character results in reality and delusion combining in dangerous ways. Out of all of the ideas, I thought the idea of the Meddler was fun, and it would be cool to see him disorient and trick the player despite, as the game reveals, his best intentions. Hope you're able to keep going with this idea!