I’m working on my microgame project, which involved top-down 3rd-person shooter movement. A picture would be easier to explain.

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

public class EntityController : MonoBehaviour
{
    // Start is called before the first frame update
    [SerializeField] private float maxAccelTime = 2;
    [SerializeField] private Camera currentCam;
    [SerializeField] private Rigidbody2D currentPlayer;

    private Vector2 cursorPos;
    private Vector2 lookDir;
    private float lookAngle;

    private float accelTime, accelMultipier;
    private float dragMultipier;
    
    void Start()
    {
        accelTime = 0;
        accelMultipier = 15;
        dragMultipier = 10;
    }

    // Update is called once per frame
    void Update()
    {
        //Control Movement Button
        MovementController();
        //Control Attack Button
        AttackController();
    }
    private void MovementController()
    {
        //Control speed of the player. Player will get faster as long as they pressing the button and not stop moving immediately when stop pressing.
        InitiateAceleration();
        //Control look direction and movement of the player.
        InitiateMovement();
    }
    private void AttackController()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            //Initiate Attack on Mouse Direction
        }
    }
    private void InitiateMovement()
    {
        //Control look direction of the player.
        cursorPos = currentCam.ScreenToWorldPoint(Input.mousePosition);
        lookDir = cursorPos - currentPlayer.position;
        lookAngle = Mathf.Atan2(lookDir.y, lookDir.x) * Mathf.Rad2Deg - 90f;

        //Control movement direction of the player.
        currentPlayer.transform.Translate(Vector2.right * Input.GetAxis("Horizontal") * accelTime * accelMultipier * Time.deltaTime);
        currentPlayer.transform.Translate(Vector2.up * Input.GetAxis("Vertical") * accelTime * accelMultipier * Time.deltaTime);

        currentPlayer.rotation = lookAngle;
    }
    private void InitiateAceleration()
    {
        if (Input.GetAxis("Horizontal") != 0 || Input.GetAxis("Vertical") != 0)
        {
            if (accelTime < maxAccelTime)
            {
                accelTime += Time.deltaTime;
            }
        }
        else
        {
            if (accelTime > 0)
            {
                accelTime -= (Time.deltaTime * dragMultipier);
            }
        }
    }
}

I tried to make a condition that if lookDir.x > 0 and lookDir.y > 0, the player will move (I thought that the shakiness was from a positional problem when the player moves really close to the cursor). Dosen’t work.