Greetings @Marius557 !
Thank you for sharing your project Those Left Behind with us!
My favorite part of your video is at mark 1:35, where it sounds like the zombie is saying, “ohhhhh godddd!” LOL! 
Are the zombies attracted to any kind of light, or are they designed to be attracted to the “smell” of live flesh (i.e. the player)? Will you be implementing a life bar when a zombie is attacked so that the player can estimate how many strikes will eliminate the zombie? Is there a limit to how many uses a player can get out of a certain kind of weapon? Finally, what are you currently working on to add to your existing project, since this is a prototype? 