(function (window, Cryptoloji, undefined) {
  'use strict'
  
  Cryptoloji.states.credits = {
    enter: function () {
      $(".credits_section").addClass("section-show")
      $(".credits_section .mozilla_button").on("click", function(){
        Cryptoloji.stateman.go(Cryptoloji.stateman.previous.name)
      })
    },
    leave: function () {
      $(".credits_section").removeClass("section-show")
    }
  }

})(window, window.Cryptoloji); 

@@ -240,16 +240,27 @@
 %0A       
+ var prev =
  Cryptol
@@ -276,11 +276,50 @@
 man.
-go(
+previous.name%0A        if(prev)%7B%0A          
 Cryp
@@ -338,22 +338,87 @@
 man.
+go(
 prev
-ious.name)
+)%0A        %7D else %7B%0A          Cryptoloji.stateman.go(%22welcome%22)%0A        %7D
 %0A   

fix logic credits back button