Touch isn't working properly.

Hi. I'm having a problem with a game I'm making. It's a 2d game using perspective camera, but for some reason touch doesn't always respond and some time when it does, it doesn't run all the code that it should... The code for touch is:

     foreach (var T in Input.touches)
     {
         var P = T.position;
         if (T.phase == TouchPhase.Began && SwipeID == -1)
         {
             SwipeID = T.fingerId;
             StartPos = P;

         }
         else if (T.fingerId == SwipeID)
         {
             var delta = P - StartPos;
             if (T.phase == TouchPhase.Moved && delta.magnitude > minMovement)
             {
                 SwipeID = -1;
                 if (Mathf.Abs(delta.x) > Mathf.Abs(delta.y))
                 {
                     if (delta.x > 0){ //Swipe right
                         checkTouch (StartPos,1);                                
                     }
                     else if (delta.x < 0){ //Swipe left
                         checkTouch (StartPos,2);
                     }
                 }
                 else
                 {
                     if ( delta.y > 0){//Swipe up
                         checkTouch (StartPos,3);
                         if( (grounded == true) && (gamestarted == true))                        
                         {
                             jump = true;
                             grounded = false;
                             anim.SetTrigger("Jump");
                         }
                     }
                     else if (delta.y < 0){//Swipe down
                         checkTouch (StartPos,4);
                     }
                 }
             }
             else if (T.phase == TouchPhase.Canceled || T.phase == TouchPhase.Ended) //Tap
             {
                 SwipeID = -1;
                 checkTouch (StartPos,5);
                 gamestarted=true;


             }
         }

     }

 void  checkTouch (Vector3 pos,int dir)
     {
         var ray = Camera.main.ScreenPointToRay(pos);
         var hit = Physics2D.GetRayIntersection(ray);
 
         
         if(hit.collider != null){
 if (dir==1) {
             
 hit.transform.gameObject.SendMessage("right",0,SendMessageOptions.DontRequireReceiver);
             }
             else if (dir==2) {
                 

 hit.transform.gameObject.SendMessage("Left",0,SendMessageOptions.DontRequireReceiver);
                 }
                 else if (dir==3) {
                     hit.transform.gameObject.SendMessage("Up",0,SendMessageOptions.DontRequireReceiver);
                 }
                 else if (dir==4){
                     hit.transform.gameObject.SendMessage("Down",0,SendMessageOptions.DontRequireReceiver);    
                 }
                 else {
 if(hit.collider.gameObject.tag == "button")
                 {                
 
                 }
     }
     }
     }

And I have code within each of those ifs that do stuff... I'm not sure if this has something to do with framerate an with high detailed textures, so I really lowered the graphics but still not working properly. I really don't know why this is happening.