Rotating projectile

function OnGUI () {

     if(GUI.Button(Rect(10, 50, 80, 20), "Launch!!")) {
     Launch();
     }

     var text = GUI.TextField(Rect(10, 10, 50, 20), angle.ToString());
     var texttwo = GUI.TextField(Rect(10, 30, 50, 20), force.ToString());

     if (int.TryParse(text, temp)){
     angle = Mathf.Clamp(0, temp, 360);
     }

     else if (text == "") angle = 0;

     if (int.TryParse(texttwo, temptwo)){
     force = Mathf.Clamp(0, temptwo, 360);
     }

     else if (texttwo == "") force = 0;

}

function Launch() {

 elevationAngle = Vector3(0,0,angle);
 throwForce = force *100;

 var banana : GameObject; 

 banana = Instantiate(prefabBanana, transform.position, Quaternion.identity);

 var elevation : Vector3 = Quaternion.Euler(elevationAngle) * transform.forward;

 new banana.rigidbody.AddForce(elevation * throwForce);

     }