Hit Detection would be nice.
Your Game is good enough but the guns and shit are all fucked up and the hit detection is shitty as hell bullets go through walls bullets are hiting you while you are far away from them its just seems like you are a little guy who loves to jump in front of bullets and in this type of games it seems like no matter what you do there is no way other than runing out in slow mo to kill someone without getting hurt...and all your guns seem to not shoot fast enough and the enemys have a lot of health.