is there any kind of GUI tutorial

Unity Engine
1

I’d like to learn how to make buttons etc that would open up scenes etc.

2 
function OnGUI () {
	if (GUI.Button(Rect(10,10,100,50),"Press me")) {
		Application.LoadLevel(0);
	}
}

Also check out the GUI scripting guide: http://unity3d.com/support/documentation/Components/GUI%20Scripting%20Guide.html

3

cheers mate~

4

I found Nicholas’ presentation from unite 07 quite useful:
http://unity3d.com/support/resources/unite-presentations/in-game-gui-made-easy

5

And quite some stuff which Shaun has posted on the forum.