unity 2D top down movement code example

Example 1: how to make a top down movement in unity 2020

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

public class PlayerMovement : MonoBehaviour
{
    public float moveSpeed = 5f;

    public Rigidbody2D rb;
    public Camera cam;

    Vector2 movement;
    Vector2 mousePos;

    // Update is called once per frame
    void Update()
    {
        movement.x = Input.GetAxisRaw("Horizontal");
        movement.y = Input.GetAxisRaw("Vertical");


        mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
    }

    private void FixedUpdate()
    {
        rb.MovePosition(rb.position + movement * moveSpeed * Time.fixedDeltaTime);

        Vector2 lookDir = mousePos - rb.position;
        float angle = Mathf.Atan2(lookDir.y, lookDir.x) * Mathf.Rad2Deg - 90f;
        rb.rotation = angle;
    }
}

Example 2: unity 2D top down movement

public float moveSpeed = 5f;

    public Rigidbody2D rb;

    private Vector2 _movement;

    // Update is called once per frame
    void Update()
    {
        _movement.x = Input.GetAxisRaw("Horizontal");
        _movement.y = Input.GetAxisRaw("Vertical");
        _movement = new Vector2(_movement.x, _movement.y).normalized;
    }

    private void FixedUpdate()
    {
        rb.MovePosition(rb.position + _movement * moveSpeed * Time.fixedDeltaTime);
    }

Example 3: top down 2d movement unity

public float Speed = 5f; 

private void Update()
    {
        input = new Vector3(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"), 0);
        Vector3 velocity = input.normalized * Speed;
        transform.position += velocity * Time.deltaTime;
    }