Can anyone tell me if this attempted version of the game MasterMind has the possibility of working? regex possible?

class Game
    attr_accessor :player_guess
    def initialize
    puts "Started a game."
    @player_guess = player_guess
    @colors = %w{red yellow green blue}.sample(4).to_s
    puts @colors
    end

    def play
        10.times do |x| 
            @player_guess

            m = /#{@colors}/.match(@answer)

            case m
                when m == @colors
                    puts "You Win!"
                    exit
                when m != @colors
                    puts "Keep Going"
                else
                    puts m[0]                   
            end
        end
    end


    def player_guess
        puts "Go ahead and choose 4 colors in any order from red, yellow, green, and blue. Then hit enter."
        @answer = gets.chomp
        @answer.downcase.split
    end
end

game = Game.new
game.play