swipe movement control

Hi there,

I am making a 2D game for touch devices but I'm having some trouble implementing touch controls. I've tried several things such as using Control Freak, coding swipes, etc. but I can't get it to work.

The kind of controls I am aiming for are similar to those in Mage Gauntlet & Wayward Souls, where the player swipes and holds in a direction, which the character gameObject follows. See https://www.youtube.com/watch?v=AjraDTy64BA 00:21 for what I mean.

Can anybody point me in the right direction & help me understand how controls like this work? Any tutorials are welcome! Here is my current script, which is from a tutorial & is not what I'm looking for.

 void Update ()
         {
 
                 float inputModifyFactor = (rigidbody2D.velocity.x != 0.0f && rigidbody2D.velocity.y != 0.0f) ? .7071f : 1.0f;
 
                 if (Input.touchCount > 0) {
                         foreach (Touch touch in Input.touches) {
                                 switch (touch.phase) {
                                 case TouchPhase.Began:
                     //This is a new touch
                                         isSwipe = true;
                                         fingerStartTime = Time.time;
                                         fingerStartPos = touch.position;
                                         break;
                     
                                 case TouchPhase.Canceled:
                     //The touch is being canceled
                                         isSwipe = false;
                                         break;
                     
                                 case TouchPhase.Ended:
                                         float gestureTime = Time.time - fingerStartTime;
                                         float gestureDist = (touch.position - fingerStartPos).magnitude;
                     
                                         if (isSwipe && gestureTime < maxSwipeTime && gestureDist > minSwipeDist) {
                                                 Vector2 direction = touch.position - fingerStartPos;
                                                 Vector2 swipeType = Vector2.zero;
                         
                                                 if (Mathf.Abs (direction.x) > Mathf.Abs (direction.y)) {
                                                         //Horizontal swipe
                                                         swipeType = Vector2.right * Mathf.Sign (direction.x);
                                                 } else {
                                                         //Vertical swipe
                                                         swipeType = Vector2.up * Mathf.Sign (direction.y);
                                                 }
                         
                                                 if (swipeType.x != 0.0f) {
                                                         if (swipeType.x > 0.0f) {
                                                                 rigidbody2D.velocity = new Vector2 (10, rigidbody2D.velocity.y * inputModifyFactor);
                                                         } else {
                                                                 rigidbody2D.velocity = new Vector2 (-10, rigidbody2D.velocity.y * inputModifyFactor);
                                                         }
                                                 }
                         
                                                 if (swipeType.y != 0.0f) {
                                                         if (swipeType.y > 0.0f) {
                                                                 rigidbody2D.velocity = new Vector2 (rigidbody2D.velocity.x * inputModifyFactor, 10);
                                                         } else {
                                                                 rigidbody2D.velocity = new Vector2 (rigidbody2D.velocity.x * inputModifyFactor, -10);
                                                         }
                                                 }
                                         }
                                         break;
                                 }
                         }
                 }
         }

Thank you so much!