You play as a witch, you need to develop your skills over each iteration to stay alive longer.
Try to keep the population of your little planet under control, but beware they become resistant the more you use the same weapons.
Try throwing, burning, freezing and squashing the little monsters.
You have just been bitten by a zombie. Everyone knows there is no cure. So how do you spend your last few minutes? By helping your once fellow survivors. The more people you help, humanity is somehow restored in your body, and reflected in the world.