2 major and 1 minor bug I noticed while getting a couple achievements off my almost completed list.
Major 1: The immobilize effect disappears for a few seconds before the game starts, allowing players to pick up weapons. This gives free kills/points.
Minor, related to above: If you are killed before the game starts you are not effected by hunger until the stacking begins taking effect, effectively giving the advantage of 1 less hunger stack compared to the rest of the players.
Major 2: Some runes work in this mini-game as I accidentally found out. In my case I use krait runes and any time I used camoflauge my on effect use would activate, essentially instantly killing any players around me.