Back in MonoDevelop in the LevelEditor class, we're going to want to first add in an OnGUI function to display the types of things we can create:

void OnGUI()
{
  GUILayout.BeginArea(new Rect(Screen.width - 110, 20, 100, 800));
  foreach(Transform item in tiles)
  {
    if (GUILayout.Button (item.name))
    {
      toCreate = item;
      
    }
  }
  GUILayout.EndArea();
}

Next, inside our GameController class, add the following code to our Update function (create the function as well if it doesn't exist in your current implementation, such as the example code):

void Update()
{
  if(Input.GetKeyDown("f2"))
  {
    this.gameObject.GetComponent<LevelEditor>().enabled = true;
  }
}

Now, if we...