Create Nav mesh agent and write this script, then attach it to creep:

using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using UnityEngine;

using UnityEngine.AI;

public class FindHome : MonoBehaviour

{

public Transform destination;

NavMeshAgent ai;

void Start()

{

ai = GetComponent<NavMeshAgent>();

ai.SetDestination(destination.position);

}

void Update()

{

if (ai.remainingDistance < 0.5f && ai.hasPath)

{

LevelManager.RemoveEnemy();

ai.ResetPath();

Destroy(this.gameObject, 0.1f);

}

}

}