Scriptum/Assets/Scripts/CamerFollow.cs

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

public class CamerFollow : MonoBehaviour
{

    private Transform playerTransform;
    private float xx;
    private float yy;
    public int drunk;
    public float max;
    public float duration;
    public float speed = 10.0f;
    public Vector3 temp;

    // Start is called before the first frame update
    void Start()
    {
        playerTransform = GameObject.FindGameObjectWithTag("Player").transform;
        PlayerPrefs.SetInt("drunk", 0);
    }

    void LateUpdate()
    {
        speed = 3f;
        max = 0.8f;
        duration += Time.deltaTime;
        drunk = PlayerPrefs.GetInt("drunk");
        if(drunk == 1)
        {
            if(duration >= max)
            {
                temp = transform.position;
                xx = Random.Range(-3.0f, 3.0f);
                yy = Random.Range(-3.0f, 3.0f);
                temp.x = playerTransform.position.x + xx;
                temp.y = playerTransform.position.y + yy;
                duration = 0f;
            }
            transform.position = Vector3.MoveTowards(transform.position, temp, speed * Time.deltaTime);
            if(transform.position.x == temp.x && transform.position.y == temp.y)
            {
                xx = Random.Range(-4.0f, 4.0f);
                yy = Random.Range(-4.0f, 4.0f);
                temp.x = playerTransform.position.x + xx;
                temp.y = playerTransform.position.y + yy;
                transform.position = Vector3.MoveTowards(transform.position, temp, speed * Time.deltaTime);
            }

        }
        else if(drunk == 2)
        {
            temp.x = playerTransform.position.x;
            temp.y = playerTransform.position.y;
            transform.position = Vector3.MoveTowards(transform.position, temp, speed * Time.deltaTime);
            if(playerTransform.position.x == transform.position.x && playerTransform.position.y == transform.position.y)
            {
                PlayerPrefs.SetInt("drunk", 0);
            }
        }
        else
        {
            // we store current camera's position here
            Vector3 temp = transform.position;
            temp.x = playerTransform.position.x;
            temp.y = playerTransform.position.y;
            transform.position = temp;
        }

    }

    public void Drink()
    {
        PlayerPrefs.SetInt("drunk", 1);
        StartCoroutine(SoberUp());
    }



    public IEnumerator SoberUp()
    {
        yield return new WaitForSecondsRealtime(10);
        PlayerPrefs.SetInt("drunk", 2);
    }
}