 Unlike the previous game , the worlds are created from Sora 's memories . As such , many of the events experienced in Kingdom Hearts are relived in this game ; Sora encounters memory @-@ based versions of Disney characters that he has met before ( the exception being the Deep Jungle world based on Disney 's Tarzan ) . The individual plotlines differ from those in the original game and revolve around the theme of memory . Just as Kingdom Hearts had several worlds created specifically for that game , Chain of Memories introduces Twilight Town as a world created from memories on " the other side of Sora 's heart " , in addition to the original worlds of Kingdom Hearts . 
