raycasting in 2d

Hey, I'm making a 2D sort of top down gravity game. In which I have to cast a ray from the camera toward my playing field I had it running perfectly a while ago but converting the code to be a fit for touchscreen input makes things a bit complicated for me.

This is my code, it doesn't seem to progress towards my debug.log that's logging "3" no matter what I try

  if (Input.GetMouseButton(0) || Input.GetMouseButtonDown(0) || Input.GetMouseButtonUp(0)) {
      touchesOld = new GameObject[touchList.Count];
      touchList.CopyTo(touchesOld);
      touchList.Clear();
      Ray ray = GetComponent<Camera>().ScreenPointToRay(Input.mousePosition);
      bool isHit = Physics.Raycast(ray, Mathf.Infinity);
      Debug.Log(ray.direction);
      if (isHit) {
          GameObject GOHit = hit.transform.gameObject;
          touchList.Add(GOHit);
          Debug.Log("3");