The Last Stand is a zombie survival game in which you need to defend your place and eliminate incoming zombies.
You should also try to make use of the sunshine by fixing the barricade that the zombies broke. You also need to look for tools and other survivors who can help you fix things. You can only make it through this zombie apocalypse if you are well-prepared and have great aim.
Aim for the zombies' heads when you shoot them to kill them before they get to your barrier. Once they began to damage your wall, you had better kill them quickly before they broke through it and added you to their group.
Have fun and good luck!