Probably a bit of a long shot by commenting here, but hopefully someone sees this and can help me out! I've gotten all the ghosts except for the one in the tunnels. I don't even know where the tunnels are for that matter. I thought the house with the chalk drawings might have something to do with it (since its the only location that doesn't seem to have a gameplay function yet) but I don't see any way of interacting with the stuff in there or stuff in any other map. Any ideas where I'm supposed to be looking for the way forward?