ghostgame.rb

class Game

    GAME_NAME = "Ghost"
    MAX_SCORE = GAME_NAME.length
    ALPHABET = Set.new("a".."z")

    def initialize(player_list)
        @players = player_list
        @word_fragment = ""
        @dictionary = initialize_dictionary("dictionary.txt")
        @scoreboard = initialize_scoreboard
    end

    def initialize_dictionary(file_name)
        words = File.readlines(file_name).map(&:chomp)
        Set.new(words)
    end

    def initialize_scoreboard
        players = {}
        @players.each { |player| players[player] = 0 }
        players
    end

    attr_reader :players, :dictionary, :scoreboard
    attr_accessor :word_fragment

    # Helper Methods
    def active_players
        active = @scoreboard.select { |_, v| v <= MAX_SCORE }
        active.keys
    end

    def valid_char?(char)
        unless ALPHABET.include?(char)
            return false
        end
        
        new_fragment = @word_fragment + char
        @dictionary.any? { |word| word.start_with?(new_fragment) }
    end

    def update_game_state(player, player_letter_choice)
        @word_fragment += player_letter_choice
        if word_complete?
            @scoreboard[player] += 1
        end
    end

    def word_complete?
        @dictionary.any? { |word| word == @word_fragment }
    end

    # Display Methods
    def prompt_choice_redo
        puts [ "The character you chose was not valid.",
               "Valid choices continute to build towards a word.",
               "The current fragment is #{word_fragment}.",
               "Please choose again."
        ].join("\n")
    end

    def display_game_state(player)
        puts "#{player} added #{@word_fragment[-1]} to the fragment."
        puts "It is now #{@word_fragment}."
        if word_complete?
            puts "#{player} spelled a word!" 
        end
    end

end

players = ["Dave", "Josh"]
ghost = Game.new(players)

This version of the ghostgame does not give me an unexpected end error.