1) Speed, because while I was crafting 800 zombies 1 time, I managed to clean the house dry and wet, throw out the trash and wash all the dishes. I went to the store and talked to friends, came and the game showed that there were still 200 days left. 2) To make elite zombies, I need to click on create n-number of times, because I can only create 1 zombie at a time....

Hi, maybe you have interest in translate the game for Portuguese-Brazil, if you want contact me sending Friend Requet or answer me! Thanks!