Unity/Assets/Scipt/MousePosition.cs

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

public class MousePosition : MonoBehaviour
{
    // Start is called before the first frame update
    [SerializeField] private Camera mainCamera;

    void Start()
    {
        
    }

    // Update is called once per frame
    private void Update()
    {
        Debug.Log(Input.mousePosition);
        Vector3 mouseWorldPosition=mainCamera.ScreenToWorldPoint(Input.mousePosition);
        mouseWorldPosition.x=0f;
        transform.position=mouseWorldPosition;
    }
}