chatgames.register_game(game_name, answer_func)
chatgames.register_question(game_name, question, answer, is_case_sensitive) -- if is not case sensitive then both the answer and the question will be converted to lower case, and the attempt text will be converted to lowercase too before running the answer func.
chatgames.start_game(game_name)            -- At game start it says, "[CHATGAMES] You have [time_to_complete] seconds to answer the question '[question]'"
chatgames.end_game(game_name, has_winners) -- If endgame runs and there are no winners then it returns to the players chat "[CHATGAMES] Nobody got it in time, the answer was '[answer]'"

chatgames.games = {}
chatgames.active_game = {}

-- Example use case
function example_answer_func(game_name, player_name, attempt_str, time_given_in_seconds, time_used, question_id_selected)
    local question_data = chatgames.games[game_name].questions[question_id_selected]
    local answer = question_data.answer
    local player = minetest.get_player_by_name(player_name)

    if answer == attempt_str then
        local reward = calculate_reward(time_given_in_seconds, time_given_in_seconds - time_used)
        emeraldbank.add_emeralds(player, reward)
        return true
    else
        return false
    end
end

-- Example game and question registration
chatgames.register_game("Unscramble", example_answer_func)
chatgames.register_question("Unscramble", "Unscramble the text 'Lpasi Lulzai'", "Lapis Lazuli", false)