OK, I'd suggest you to do this: 1) Start a new scene. 2) Create a new empty gameobject and rename it to "GameManager" without the "" signs 3) Add the component GameManager to it 4) Click on "SETUP" button on the inspector for GameManager script that you just added 5) Edit everything from there It seems like the scene you're using currently has some layers that are setup but not assigned by you, which makes the errors grow. Instead of describing out to you how to delete the layers (which are written in the documents following in the package), I'll let you create the whole thing from start so that you can edit it from there. PS: When creating / adding a new weapon to the weapon database, add one - not two or three - add just one and then fill out everything, when you're done you can add a new one. Same goes with all the animations!