UNITY : DESIGNING ENEMIES FOR YOUR GAME

 Code used in the video:

EnemyController

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class EnemyController : MonoBehaviour {

  Rigidbody2D enemyRB;

  float moveSpeeed = 200.0f;

  [SerializeField] float direction;

  // Use this for initialization

  void Start () {

    enemyRB = GetComponent<Rigidbody2D>();

  }

 

  // Update is called once per frame

  void Update () {

    if(direction == 1){

      transform.localScale = new Vector3(-1, 1, 1);

    }else if(direction == -1){

      transform.localScale = new Vector3(1, 1, 1);

    }

    enemyRB.velocity = new Vector2(direction * moveSpeeed * Time.deltaTime, enemyRB.velocity.y);

  }

  private void OnCollisionEnter2D(Collision2D other) {

    direction *= -1;

  }

  private void OnTriggerEnter2D(Collider2D other) {

    direction *= -1;

  }

}