I like short games in a gamejam :) makes it possible to get many impressions and sample more of the submissions. I did run into a bug where I accidentally dropped one of my KO targets and couldn't pick it up anymore because it was behind an alive target.
Currently the targets get their faces only after you have to hunt them, which makes them stand out a lot. I think it might be interesting to consider giving all the targets faces from the get go, that way it's actually much harder to find the target!