Вид зверху без Rigidbody2D

private float movementSpeed = 5f;

void Update() 

{ 

     float horizontalInput = Input.GetAxis("Horizontal"); 

     float verticalInput = Input.GetAxis("Vertical");

     transform.position = transform.position + new Vector3(horizontalInput * movementSpeed * Time.deltaTime, verticalInput * movementSpeed * Time.deltaTime, 0);

}