The only reason I've kept watching it is because there's really nothing else on.
My biggest complaints are that the "clue" at the end pretty much ruins the deduction aspects for anyone who's "team" finds it. I think it would run better without that big "reveal".
Also, the murderer seems to have nothing to do with anything going on. The "plant" in the group doesn't really seem to be affecting anything, and there are next to no clues in the individual "murders" that point to him/her. Nor anything in the game where it matters who the murderer is. Remove that aspect from the game, and it makes no difference whatsoever.
If it wasn't the summer, I'd have long axed this show.