my_game.rb

# Bill Gathen (@epicpoodle)
#
class MyGame
  def initialize
    @teleported = false
    @took_gold = false
    @room = :entry
  end

  def play
    loop do
      describe(@room)
      act_on(choice)
    end
  end

  def describe room
    rooms = {
      entry: "You are in a room with a blue door and a red door.",
      blue: "You are in a blue room with #{@teleported ? 'a gold door' : 'a teleporter in the center. There are no exits' }.",
      red: "You are in a red room with #{@teleported ? 'a gold door' : 'a teleporter in the center. There are no exits' }.",
      gold: "You are in a gold room with #{@took_gold ? 'no exits' : 'a door leading to safety and a pile of gold on the floor' }."
    }
    puts rooms[room]
  end

  def choice
    print '> '
    gets.chomp
  end

  def act_on choice
    if choice.include? "look"
      # no op
    elsif @room == :entry
      if choice.include? "red"
        @room = :red
      elsif choice.include? "blue"
        @room = :blue
      else
        complain
      end
    elsif @room == :blue or @room == :red
      if @teleported
        if choice.include? "gold" or choice.include? "door"
          @room = :gold
        else
          complain
        end
      else
        if choice.include? "teleport"
          @teleported = true
          puts "The world goes swimmy. This must be what teleporting feels like..."
          if @room == :red
            @room = :blue
          else
            @room = :red
          end
        else
          complain
        end
      end
    elsif @room == :gold
      if @took_gold
        dead("You search in vain for escape but eventually starve, cuddling your pile of gold.")
      elsif choice.include? "door"
        puts "Prudence wins out over greed. The sun shines on your face and you know you made the right decision. You win."
        Process.exit(0)
      elsif choice.include? "gold"
        puts "You take the gold. You're rich. You're a happy miser."
        @took_gold = true
      else
        complain
      end
    else
      dead("Interesting choice.")
    end
  end

  def dead why
    puts "#{why} You're dead."
    Process.exit(0)
  end

  def complain
    puts "I don't understand you."
  end
end

if $0 == __FILE__
  MyGame.new.play
end