My sprite is rotating in z axis, how to stop this?

Questions & Answers
1

When i let them follow my player this happens: Screenshot - 4974ae27d25bb9a20d72b2ab071d16b5 - Gyazo

They are rotating in z axis

This is my code that lets them move:
using UnityEngine;
using System.Collections;

public class EnemyAI : MonoBehaviour 
{
	Transform Hero;
	public float AISpeed = 1f;
	public float MaxDistance = 10f;
	public float Mindistance = 2f;

	void Start ()
	{
		Hero = GameObject.FindGameObjectWithTag("Player").transform;  
	}

	void FixedUpdate ()
	{
		transform.LookAt (Hero);
		AI ();
	}

	void AI()
	{
		if(Vector3.Distance (transform.position, Hero.position) >= Mindistance)
		{
			transform.position = Vector3.MoveTowards(transform.position, Hero.position, AISpeed);

			if(Vector3.Distance (transform.position, Hero.position) >= MaxDistance)
			{

			}
		}
	}


	
}
2

Don’t use LookAt (or any of its equivalents) in 2D. They point the Z-axis, which just won’t work. Try Mathf.Atan2.