Clickable World Object.

I'm trying to make a world object clickable to activate a certain function.

For example, A door that when you click on it would load the indoor scene. But, seeing that I'm still new to this, I'm totally lost on where to even start.

Any help would be great.

The simplest way is OnMouseDown...the object must have a collider for this to work, and this script should be attached to the object:

function OnMouseDown () {
    Application.LoadLevel("Indoors");
}

Assuming your indoor scene is called "Indoors", of course.

just create a function called OnMouseDown () in a script and attach ti to your GameObject (e.g your dor)

function OnMouseDown ()
{
   Application.LoadLevel ("insideScene");
}

it just works with left click so if you need another button use OnMouseOver function and inside it use if and GetMouseButtonDown to see wich button is pressed.

function OnMouseOver ()
{
   if (Input.GetMouseButtonDown (1) == true)
   {
      //put code here
   }
}