This is wonderfully brilliant. Certainly an original idea by my knowledge as I've never really seen a game do something like this before. If there weren't so many submissions then I'd send more time playing this for sure.
Something like this could add a really interesting dynamic for multiplayer games and is certainly something I'll keep in the back of my mind. Hope you don't mind XD
Well done!
P.S.
Shameless self plug. I don't think mine is as creative as your's, but I'd love to have some feedback for it! It's my first time and I went in solo: https://bigfraudbigfraud.itch.io/gmtkjam2019