Nice theme, I'd love to join the jam, but there are too few people participating on it. I think that the main reason is that the briefing is a little intimidating. Game styles such as Battle Royale require a lot of programming/design skills and also a lot of time and dedication. In fact, making a multiplayer game, as simple as it can be, is already challenging. I'd take down this jam, postpone it and add a more friendly description. Let beginners know that they are welcome, they just have to make a multiplayer shooter game. I'm pretty sure you'll have many jammers interested.