GUI is not showing up, but script seems to be fine

Hi!

I made this simple GUI script based on some tutorials, and after applying it to empty game object and pushing play, GUI won't show up. Any ideas?

private var buttonWidth:int = 200; private var buttonHeight:int = 50; var spacing:int = 25;

 function OnGUI() 
 {
     GUILayout.BeginArea(Rect(Screen.width/2 - buttonWidth/2, Screen.height/2 - 200, buttonWidth, - 400));
         if(GUILayout.Button("New Game", GUILayout.Height(buttonHeight)))
         {
             Application.LoadLevel("Game");
         }
         GUILayout.Space(spacing);
         if(GUILayout.Button("Continue", GUILayout.Height(buttonHeight)))
         {
             Application.LoadLevel("testcontinue");
         }
         GUILayout.Space(spacing);
         if(GUILayout.Button("Exit", GUILayout.Height(buttonHeight)))
         {
             Application.Quit();
         }
     GUILayout.EndArea();
 }