code: def reward_explore(self):
          
          if not 'explore' in self.mode:
              return
          mode = self.mode['explore']
          if mode and mode['reward'] and self.__test_cond(mode):
              self.player.stats['reward'] += mode['reward']
              self.player.stats['score'] += mode['reward']
  
              self.player.game_over = self.player.game_over or mode['terminal']
docs: Add an exploration reward