Making multitouch button

Hello! I try to making a multitouch button "jump". At this moment I had written the touching on button immediately (touching only this button).

Now i want to writing the touching to this button with other buttons. For example: touch moving joystick and touch button "jump". Can you help me with it?

Script:

     void Update () {
                 int count = Input.touchCount;    
                 if( count == 1 )
                 {
                     Touch touch = Input.GetTouch(0);
                 
                     // Touch only jump button
                     if ( jumpButton.HitTest( touch.position ) )
                     {
                         characterSphere.upForce();
                     }
 
 // trying to writing: to touch jump button and other button
                     else if ( !jumpButton.HitTest( touch.position ) || touch.phase != TouchPhase.Began )
                     {
                         characterSphere.upForce();
                     }
                 }
             }

I take this code (program) in Penelop iPhone tutorial.

Please sorry if my English is poor.

Could you say me my mistakes in language?