Ruby Math game

game.rb

class Game

  @@rightwrong = ['Seriously? NO!', 'ZOMG no nNOOOO!', 'Are you blind? WRONG', 'Maybe math isn\'t your thing']


  def challenge(ans)
    ans == $stdin.gets.chomp.to_i
  end

  def new_turn
    return "----- NEW TURN -----"
  end

  def game_over (name, score)
    str = "#{name} wins with a score of #{score}\n----- GAME OVER -----\nGood Bye!"
  end

  def response(right)
    str = ''
    right ? str = "CORRECT" : str = @@rightwrong[rand(4)-1]
    return str
  end
end

main.rb

require './player.rb'
require './question.rb'
require './game.rb'

play1 = Player.new

play2 = Player.new

game = Game.new

player = play1
begin
  q = Question.new
  puts "#{play1.name}: #{q.ques}"
  right = game.challenge(q.answer)
  puts "#{play1.name}: #{game.response(right)}"
  right ? play1.right : play1.lose
  puts "P1: #{play1.lives}/3 vs P2: #{play2.lives}/3"
  if play1.lives == 0
    winner = play2
    break
  end
  puts game.new_turn

  q = Question.new
  puts "#{play2.name}: #{q.ques}"
  right = game.challenge(q.answer)
  puts "#{play2.name}: #{game.response(right)}"
  right ? play2.right : play2.lose
  puts "P1: #{play1.lives}/3 vs P2: #{play2.lives}/3"
  if play2.lives == 0
    winner = play1
    break
  end
end while play1.lives > 0 && play2.lives > 0


puts game.game_over(winner.name, winner.score)

player.rb

class Player

  attr_reader :name, :lives, :score
  attr_writer :name, :lives

  @@count = 0

  def initialize
    @@count += 1
    puts "Enter a name for Player #{@@count}"
    @score = 0
    @lives = 3
    @name = $stdin.gets.chomp
    puts "#{@name} has #{@lives} lives with a score of #{@score}"
  end

  def lose
    @lives -= 1
  end

  def right
    @score += 1
  end
end

question.rb

class Question

  attr_reader :ques, :answer

  def initialize
    first = rand(10)
    last = rand(10)
    @ques = "What does #{first} plus #{last} equal?"
    @answer = first + last

  end


end