I have a main menu, and I want to have another button with more games. How can I do that?

public var welcomeLabel : GUIStyle; public var scoreLabel : GUIStyle; public var customSkin : GUISkin; public var welcomeRocket : Rect; public var playGameRect : Rect; public var quitRect : Rect;

function OnGUI(){

 Screen.lockCursor = false;
 Time.timeScale=1;   
 
         var scale : Vector3 = new Vector3(Screen.width / 1280.0, Screen.height / 1024.0, 1.0);

         GUI.matrix = Matrix4x4.Scale(scale);                                                                      
                     
         GUI.Label(welcomeRocket, "ParkingGame",welcomeLabel);
             
         GUI.skin = customSkin;
          
                     
              GUI.skin = customSkin;        //1
             if(GUI.Button(playGameRect, "Play")){
              
                 Application.LoadLevel(1);
             }
         
                     
        
                     
         if(GUI.Button(quitRect,"Exit")){
             Application.Quit();
         }
                     
     }