separate the X and Y axis control systems and use different style of control

I am trying to create a 2D game. However, I am facing some obstacles regarding the control of the game. I want to separate the X and Y axis control systems and use different style of control. I hope to use tapping control to move the character along the Y axis. While I would like to use tilting with accelerometer to control the Left Right movement along the X axis. I am now using two different scripts for the two systems, yet my character is stuck at the left wall without moving up nor down. I have attached my code below. Thank you for your kind help and concern.

Tapping

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class jumping_cat : MonoBehaviour { public float velocity = 1; private Rigidbody2D rb;

 // Start is called before the first frame update
 void Start(){
  rb = GetComponent<Rigidbody2D>();   
     
 }

 // Update is called once per frame
 void Update(){
  

if(Input.GetMouseButtonDown(0)) { rb.velocity= Vector2.up*velocity; } } }

LeftRight Tilting

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class leftright_tilting : MonoBehaviour {

 Rigidbody2D rb;
 float dirX;
 float moveSpeed = 20f;

 // Use this for initialization
 void Start () {
     rb = GetComponent<Rigidbody2D> ();
 }
 
 // Update is called once per frame
 void Update () {
     dirX = Input.acceleration.x * moveSpeed;
     transform.position = new Vector2 (Mathf.Clamp (transform.position.x, -7.5f, 7.5f), transform.position.y);
 }

 void FixedUpdate()
 {
     rb.velocity = new Vector2 (dirX, 0f);
 }

} ,I am trying to create a 2D game. However, I am facing some obstacles regarding the control of the game. I want to separate the X and Y axis control systems and use different style of control. I hope to use tapping control to move the character along the Y axis. While I would like to use tilting with accelerometer to control the Left Right movement along the X axis. I am now using two different scripts for the two systems, yet my character is stuck at the left wall without moving up nor down. I have attached my code below. Thank you for your kind help and concern.

The tapping

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class jumping_cat : MonoBehaviour { public float velocity = 1; private Rigidbody2D rb;

 // Start is called before the first frame update
 void Start(){
  rb = GetComponent<Rigidbody2D>();   
     
 }

 // Update is called once per frame
 void Update(){
  

if(Input.GetMouseButtonDown(0)) { rb.velocity= Vector2.up*velocity; } } }

the left right tilting

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class leftright_tilting : MonoBehaviour {

 Rigidbody2D rb;
 float dirX;
 float moveSpeed = 20f;

 // Use this for initialization
 void Start () {
     rb = GetComponent<Rigidbody2D> ();
 }
 
 // Update is called once per frame
 void Update () {
     dirX = Input.acceleration.x * moveSpeed;
     transform.position = new Vector2 (Mathf.Clamp (transform.position.x, -7.5f, 7.5f), transform.position.y);
 }

 void FixedUpdate()
 {
     rb.velocity = new Vector2 (dirX, 0f);
 }

}