[HELP THE PIG] 2D Platformer Game

Hi, I'm very new to Unity and I want to make a 2D Platformer Game! I'm trying to make an enemy behaviour script, but the enemy doesn't follow the player when in range and it doesn't attack the player (It can move around on certain point, it just can't follow the player).

Here the script:

Code (CSharp):

1. using System;
2. using System.Collections;
3. using System.Collections.Generic;
4. using System.Collections.Specialized;
5. using System.Runtime;
6. using System.Security.Cryptography;
7. using System.Threading;
8. using UnityEngine;
9.  
10. public class EnemyBehaviour : MonoBehaviour
11. {
12.  
13.     #region Public Varaibles
14.     public float attackDistance;
15.     public float moveSpeed;
16.     public float timer; //Timer for cooldown
17.     public Transform leftLimit;
18.     public Transform rightLimit;
19.     [HideInInspector] public Transform target;
20.     [HideInInspector] public bool inRange;
21.     public GameObject hotZone;
22.     public GameObject triggerArea;
23.     #endregion
24.  
25.     #region Private Variables
26.     private Animator anim;
27.     private float distance;
28.     private bool attackMode;
29.     private bool cooling;
30.     private float intTimer;
31.     #endregion
32.  
33.     void Awake()
34.     {
35.         SelectTarget();
36.         intTimer = timer;
37.         anim = GetComponent<Animator>();
38.     }
39.  
40.     void Update()
41.     {
42.         if (!attackMode)
43.         {
44.             Move();
45.         }
46.  
47.         if(!InsideofLimits() && !inRange && !anim.GetCurrentAnimatorStateInfo(0).IsName("Attack"))
48.         {
49.             SelectTarget();
50.         }
51.  
52.         if (inRange)
53.         {
54.             EnemyLogic();
55.         }
56.     }
57.  
58.     void EnemyLogic()
59.     {
60.         distance = Vector2.Distance(transform.position, target.position);
61.  
62.         if (distance > attackDistance)
63.         {
64.             StopAttack();
65.         }
66.         else if (attackDistance >= distance && cooling == false)
67.         {
68.             Attack();
69.         }
70.  
71.         if (cooling)
72.         {
73.             Cooldown();
74.             anim.SetBool("Attack", false);
75.         }
76.     }
77.  
78.     void Move()
79.     {
80.         anim.SetBool("canWalk", true);
81.  
82.         if (!anim.GetCurrentAnimatorStateInfo(0).IsName("Attack"))
83.         {
84.             Vector2 targetPosition = new Vector2(target.position.x, transform.position.y);
85.  
86.             transform.position = Vector2.MoveTowards(transform.position, targetPosition, moveSpeed * Time.deltaTime);
87.         }
88.     }
89.  
90.     void Attack()
91.     {
92.         timer = intTimer;
93.         attackMode = true;
94.  
95.         anim.SetBool("canWalk", false);
96.         anim.SetBool("Attack", true);
97.     }
98.  
99.     void Cooldown()
100.     {
101.         timer -= Time.deltaTime;
102.  
103.         if (timer <= 0 && cooling && attackMode)
104.         {
105.             cooling = false;
106.             timer = intTimer;
107.         }
108.     }
109.  
110.     void StopAttack()
111.     {
112.         cooling = false;
113.         attackMode = false;
114.         anim.SetBool("Attack", false);
115.     }
116.  
117.     public void TriggerCooling()
118.     {
119.         cooling = true;
120.     }
121.  
122.     private bool InsideofLimits()
123.     {
124.         return transform.position.x > leftLimit.position.x && transform.position.x < rightLimit.position.x;
125.     }
126.  
127.     public void SelectTarget()
128.     {
129.         float distanceToLeft = Vector2.Distance(transform.position, leftLimit.position);
130.         float distanceToRight = Vector2.Distance(transform.position, rightLimit.position);
131.    
132.         if(distanceToLeft > distanceToRight)
133.         {
134.             target = leftLimit;
135.         }
136.         else
137.         {
138.             target = rightLimit;
139.         }
140.  
141.         Flip();
142.     }
143.  
144.     public void Flip()
145.     {
146.         Vector3 rotation = transform.eulerAngles;
147.         if(transform.position.x > target.position.x)
148.         {
149.             rotation.y = 180f;
150.         }
151.         else
152.         {
153.             rotation.y = 0f;
154.         }
155.  
156.         transform.eulerAngles = rotation;
157.     }
158. }
159.  
160.  

 

If anyone can help me fix the script or show me how to make enemy damage player health that would be very appreciate

 

If I remember correctly, Vector3 is for 3d.
Unless something was changed in Unity, and I strangely didn't know about it.