The new update adds a zombie mode. Zombies hear the sound of a shot and move towards you if you are close. After a shot and hitting a zombie next to you, the zombie also reacts to you. If after a shot at a large distance in a zombie and the zombie does not see you, then they run away. Do not let the zombie get close to you, it will hold you until you jump. Sometimes a zombie is enough to hit you once and that’s it, the game is over.