I would disagree with the other dude, the Navigation itself is fine. The light switch option where it is, is also fine but I think it should be explained to the player in an obvious manor. Like some sort of short, UI tutorial or on screen image that labels everything with a short explanation before playing.
As a side note, I love the game so far, great potential. The art style in particular is appealing and I'm looking forward to see how far the story and interaction with the other cast go.