SimpleDelegator space_merchant?

space_merchant

#!/usr/bin/env ruby
#
# space_merchant
$LOAD_PATH << File.expand_path(File.dirname(__FILE__) + '/../lib')
require 'space_merchant'

include SpaceMerchant

player = SpaceMerchant::Player.instance

puts
puts "Welcome to Space Merchant #{SpaceMerchant::VERSION}, " +
     "the Ruby Quiz game!"
puts

print "What would you like to be called, pilot? "
loop do
  name = gets.chomp

  if name =~ /\S/
    player[:name] = name

    puts "#{player[:name]} it is."
    puts

    puts "May you find fame and fortune here in the Ruby Galaxy..."
    puts

    break
  else
    print "Please enter a name: "
  end
end

player[:credits] = 1000

# we initialize player[:location], it should be changed to move the player
player[:location] = SpaceMerchant::Galaxy.instance.starting_location

catch(:quit) do
  # primary event loop
  loop { player[:location].handle_event(player) }
end

space_merchant.rb

#!/usr/bin/env ruby
#
# space_merchant.rb

require 'singleton'
require 'delegate'

module SpaceMerchant
  VERSION = "1.0"

  # We will use a basic Hash, but feel free to add methods to it
  class Player
    include Singleton
    def initialize
      @game_data = SimpleDelegator.new({})
    end

  end
end

  require 'space_merchant/galaxy'
  require 'space_merchant/sector'
  require 'space_merchant/station'
  require 'space_merchant/planet'

Try

class Player < SimpleDelegator
  def initialize
    super({})
  end
end

But add include Singleton