Answer by RedDevil

You cannot acces the gold amound like this mainScript = GameObject.Find ("Main Camera").GetComponent(goldAmount); GetComponent is meant for getting components of an object.Like getting the transform property or a script but definetly not a variable from that script. Try like this: var MainScript = GameObject.Find ("Main Camera").GetComponent("mainScript"); //i would change the variable named mainScript too so there are no confusions... //then you acces it through the MainScript object MainScript.goldAmount = 100;