Thank you.
It is a simple cartridge basically providing a sound track to a nightcache. You start it going then as you enter certain zones sound effects automatically go off. There is no interaction required from the player so I can't see where they can do anything wrong. Because they are following fire tacks, they can't really miss the zones and I have made the zones pretty big areas. One player got the cartridge started but only one zone went off then nothing, the second player didn't get it started so I think that was user error as he hadn't done a Wherigo before. It's no BIG deal if the Wherigo doesn't work as it is an optional extra to add atmosphere to the night cache, it doesn't stop them finding the cache if it doesn't work, but it would be so much better with it.