On one hand, yes, you should absolutely include instructions, rules on how to play and even a scenario for people to play out. Without these things, you're just asking people to make it up on their own and... well, that would make THEM the game dev, not you.
However, I don't think a LARPing game like this really fits with our event anyway. Since FQ events are as much about our indie streamers as it is the indie game devs, trying to stream a LARP game is just... really difficult. Putting aside the fact that you'd need specific equipment that most indie streamers likely wouldn't have just to record and stream it, you would need multiple people as well as proper outfits to do so. I can't speak for others but, as the person who makes a point of looking at and trying to play every game in these events, I can't do that. I don't have the equipment. I don't have the outfits. I don't have access to enough people to do a LARPing game, especially on short notice. It just would not be possible for me to stream the game. It just doesn't fit with the design of this event.