Mimic Keyboard Controls with Joystick

I am trying to get a single Joystick on mobile to behave like keys. So up is up but up and right is forward and rotate right.

I think my logic is bad but have been at it for hours so looking for some help.

Thanks in advance

 function Update()
 {
     
     // Keyboard Contols
     if (Input.GetKey ("up"))
     
     player.transform.Translate(Vector3.forward * Time.deltaTime * forward);
     
     if (Input.GetKey ("down"))
     player.transform.Translate(Vector3.forward * -Time.deltaTime * backward);
     
     if (Input.GetKey ("left"))
     player.transform.Rotate(Vector3.up * -Time.deltaTime * turnSpeed);
     
     if (Input.GetKey ("right"))
     player.transform.Rotate(Vector3.up * Time.deltaTime * turnSpeed);
     
     //Touch Controls
     
     // Apply movement from move joystick
     var absJoyPos = Vector2( Mathf.Abs( moveTouchPad.position.x ), Mathf.Abs( moveTouchPad.position.y ) );
     
     // Movement
     if ( absJoyPos.y > absJoyPos.x )
     {
         if ( moveTouchPad.position.y > 0 && absJoyPos.x > 0){
             player.transform.Rotate(Vector3.up * Time.deltaTime * turnSpeed);
         }
         if ( moveTouchPad.position.y < 0 && absJoyPos.x < 0){
             player.transform.Rotate(Vector3.up * -Time.deltaTime * turnSpeed);
         }
         player.transform.Translate(Vector3.forward * Time.deltaTime * forward);
         
     }
     if ( absJoyPos.y < absJoyPos.x ){
         if ( moveTouchPad.position.y > 0){
             player.transform.Rotate(Vector3.up * Time.deltaTime * turnSpeed);
         }
         if ( moveTouchPad.position.y < 0 ){
             player.transform.Rotate(Vector3.up * -Time.deltaTime * turnSpeed);
         }
         player.transform.Translate(Vector3.forward * -Time.deltaTime * backward);
     }
     
     
     if ( absJoyPos.x > absJoyPos.y )
     {
         if ( moveTouchPad.position.x > 0 ){
             player.transform.Rotate(Vector3.up * Time.deltaTime * turnSpeed);
         }
         if ( moveTouchPad.position.x < 0 ){
             player.transform.Rotate(Vector3.up * -Time.deltaTime * turnSpeed);
         }
         
     }
     
 }