https://www.bloc.io/ruby-warrior

gistfile1.rb

class Player
  def play_turn(warrior)
    if warrior.health < @health && warrior.health < 12
      warrior.walk!(:backward)
    else
      if warrior.health < 20 && warrior.health >= @health
        warrior.rest!
      else
        if warrior.feel.wall?
          warrior.walk!(:backward)
        end
        if warrior.feel.empty?
          warrior.walk!
        end
        if warrior.feel.enemy?
          warrior.attack!
        end
        if warrior.feel.captive?
          warrior.rescue!
        end
      end
    end
    
     @health = warrior.health
  end
end