1 << LayerMask.NameToLayer('Player')

private int _clickLayer;//слой 'Player'

  public void Awake () {
        _clickLayer = LayerMask.GetMask('Player');
    }

using UnityEngine;
using System.Collections;

public class Emocion : MonoBehaviour {
    public GameObject player;
    public GameObject Targetd;
    public Sprite evil, normal;
    public float distance = 5f;
    private int _ClickLayer;

    public void Awake() {
  _ClickLayer = LayerMask.GetMask("Player");
    }
    void Start() {

    }
    void Update () {
  RaycastHit2D hit = Physics2D.Raycast(player.transform.position, Vector3.right, distance);
  Debug.DrawRay (player.transform.position, Vector3.right, Color.red);//Луч рисуется
  if (Targetd.tag == "Pink") {
   GetComponent<SpriteRenderer> ().sprite = evil;
  } else {
   GetComponent<SpriteRenderer> ().sprite = normal;
  }
  }
    }