The referenced script on this Behaviour is missing!

I have no idea whatsoever of whats happening here

it doesn’t say which one though

One of your objects in the scene has a script component with no script.
This happens when you delete a script from your project thats still assigned somewhere to a gameObject.

Unity should add the gameobjects name to that warning message so it would be easy to find :confused:

This could help you out:
http://wiki.unity3d.com/index.php?title=FindMissingScripts