Code quiz for Kabam

kabam_game.rb

#!/usr/bin/env ruby
  DIRECTIONS =['N', 'E', 'S', 'W']

class Hero
  
  def initialize(x,y,direction)	
    @x = x
    @y = y
    @direction = direction
  end

 def turn(input)
   direction = @new_direction ||= @direction
   hash = Hash[DIRECTIONS.map.with_index.to_a]
   if input == 'L' 
   	new_direction_key = hash[direction] - 1 
   else 
   	new_direction_key = hash[direction] + 1   
   end
   if new_direction_key == 4
    @new_direction = 'N'
   else
   	@new_direction = DIRECTIONS[new_direction_key]
   end	 
 end

 def move(input)
   if input != "M"
     turn(input)
   else
     move_forward_one
   end  	
 end 

 def move_forward_one
   direction = @new_direction ||= @direction
     if direction == 'N' 
       @y = @y + 1
     elsif direction == 'S'
       @y = @y - 1
     elsif direction == 'E'
       @x = @x + 1
     else direction == 'W'
       @x = @x - 1
     end 
   @direction = @new_direction
   new_coordinates = @x.to_s+ ' ' + @y.to_s + ' ' + @direction
 end	

end

h1 = Hero.new 1,2,'N'
h2 = Hero.new 3,3,'E'


h1.move 'L'
h1.move 'M'
h1.move 'L'
h1.move 'M'
h1.move 'L'
h1.move 'M'
h1.move 'L'
h1.move 'M'
puts h1.move 'M'
puts "*****"
h2.move 'M'
h2.move 'M'
h2.move 'R'
h2.move 'M'
h2.move 'M'
h2.move 'R'
h2.move 'M'
h2.move 'R'
h2.move 'R'
puts h2.move 'M'