Look, this is a survival game.
You need to build a base, explore the world, gather loot, craft clothes, make weapons, and so on.
There are 3 types of zombies and bandits in the game.
Right now, you are dealing with the first type of zombies. As you level up, new zombies will come alongside the old ones. After that, bandits will start appearing, then the third type of zombies, and so on.
Zombies have a special mechanic involving sperm. If they impregnate you, there is a scene where you become pregnant. This sperm can actually kill you, so on the base, there is a special device that sucks the sperm out of you.
There is also a toilet and a shower. When you collect sperm, you can create your own friendly zombies that will fight for you.
You also earn tokens for this, which you can use to buy items or call reinforcements (soldiers). There are traps to capture zombies.
There are farms for building so you always have food, and a water machine to produce water. There is also a building mechanic to construct your house and more.