You need to remember lots of mechanics to survive and not to die, for example, remember that Withered Mechanical Lord can be only scared away by pressing his left eye, Withered Wolfy, Withered Sparky and Withered Foxy can be only scared away by pressing their noses, Toy Wolfy, Toy Foxy, Toy Sparky, Toy Krusty can be only scared away by mask, Afton can only be scared away by shocker. Just try to remember it all from first try. Isn't this difficult!?