asd

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

public class move : MonoBehaviour {

    public float speed = 20f;
    private Rigidbody2D rb;
    private int face = 1; //0 for up, 1 for right, 2 for down, 3 for left
    private float rt = 0f;

    void Start () {
        rb = GetComponent <Rigidbody2D> ();
    }

    void Update () {
        Vector3 cur = transform.position;
        if (Input.GetKey (KeyCode.A)) {
            cur.x += -speed * Time.deltaTime;
        }
        if (Input.GetKey (KeyCode.D)) {
            cur.x += speed * Time.deltaTime;
        }
        if (Input.GetKey (KeyCode.W)) {
            cur.y += speed * Time.deltaTime;
        }
        if (Input.GetKey (KeyCode.S)) {
            cur.y += -speed * Time.deltaTime;
        }
        transform.position = cur;
        rtt ();
    }

    void rtt () {
        float cur = Mathf.Atan2 (Input.mousePosition.y - Screen.height / 2f, Input.mousePosition.x - Screen.width / 2f) / Mathf.PI * 180f;
        transform.Rotate (0f, 0f, cur - rt); rt = cur;
    }
}