i noticed that somehow the fps change tha gameplay.thats why the buttons press b4 play on main menu sets all setings to low.As for the knife you grab once (and you throw it) you cant grab it again thats why sometimes the knifes didnt grab or maybe low fps.As for the enemies you are right but i dont find it so bad, maybe im wrong :P
THANKS for playing i hope you enjoyed !!! dont forget to rate