c# - Unity Player Movement Y Axis(Something like Swing Copters)

My Player moves on Y AXIS , but sometimes it doesnt go up but stucks in one place, Script is like in swing copters , when you touch it rotates to another side but its on X Axis , i took and made it on Y axis , but it doesnt work properly , player sometimes doesnt turn around and go up or back Please help out , sorry for bad english

void MovePlayerOnYAxis()
    {

        foreach (Touch touch in Input.touches)
        {


            moveL = !moveL;


            if (moveL)
            {

                transform.localScale = new Vector3(1, -1, 1);
            }
            else
            {
                transform.localScale = new Vector3(1, 1, 1);
            }


            huongbay = transform.localScale.x;
        }
        transform.root.Translate(Vector3.up * speed * huongbay * Time.deltaTime);
    }

Pre-Fix From @PompeyPaul But Player still doesnt go Down , it now goes only up.

void MovePlayerOnYAxis()
    {

        foreach (Touch touch in Input.touches)

        {

            WasTouched = !WasTouched;


            if (WasTouched)
            {
                if (Input.touchCount == 0)
                {
                    WasTouched = false;


                    transform.localScale = new Vector3(1, 1, 1);
                }
            }
            else
            {
                if (Input.touchCount > 0)
                {
                    WasTouched = true;
                    transform.localScale = new Vector3(1,-1, 1);

                }

            }
            huongbay = transform.localScale.y;

        }
        transform.root.Translate(Vector3.up * speed * huongbay * Time.deltaTime);
    }