PlayerMovement

using UnityEngine;

public class PlayerMovement : MonoBehaviour {

    public float speed = 0.02f;

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

        Vector3 move = new Vector3(x, y, 0);
        move.Normalize();

        transform.position = transform.position + move * speed;
    }
}