Jump by touch

Hello all, I am working on game that jump when you touch the screen and I want you jump while you touch the screen with one finger with a limit time for jumping (.2 s), I made a code but I don't know why it doesn't work & here it is: bool jumpingPossible; float jumpingTimer; void FixedUpdate (){ if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began){ { jumpingPossible = true; jumpingTimer = 0f; } if(jumpingPossible) { rigidbody.AddForce(0f, 30f, 0f); jumpingPossible = jumpingTimer <= 0.2f; jumpingTimer += Time.deltaTime; if( Input.GetTouch(0).phase == TouchPhase.Ended || Input.GetTouch(0).phase == TouchPhase.Canceled) jumpingPossible = false; } }

and I'll be relly grateful for who help