Monacaの作ったアプリにニフクラを実装したい

実現したいこと

ニフクラを使えるようにし、最新の人から五人までの問題に正解できた数（スコア）を表示させたい

発生している問題・分からないこと

やってみようとしたが、「const ncmb = new NCMB(APP_KEY, CLIENT_KEY);」でエラーが起きてしまう
エラー文
↓↓↓↓
Uncaught ReferenceError: NCMB is not defined
at quiz.js:24:14

該当のソースコード

JavaScript
1const main = document.getElementById("main");
2const scores = document.getElementById("scores");
3const home = document.getElementById("home");
4const quiz = document.getElementById("quiz");
5const btnbox = document.getElementById("btn-box");
6const sansyou = document.getElementById("sansyou");
7const gakas = document.getElementById("gakas");
8const backbutton = document.getElementById("backbutton");
9const score = document.getElementById("score");
10
11quiz.style.display = "none";
12btnbox.style.display = "none";
13backbutton.style.display = "none";
14scores.style.display = "none";
15
16let correct = 0;
17let quizCnt = 0;
18
19function startGame(){
20    quiz.style.display = "block";
21    btnbox.style.display = "block";
22    backbutton.style.display = "block";
23    main.style.display = "none";
24    scores.style.display = "none";
25    home.style.display = "none";
26    sansyou.style.display = "none";
27    correct = 0;
28}
29
30const question = [];
31
32
33    const monndai = document.getElementById("question");
34    const ans1 = document.getElementById("ans1");
35    const ans2 = document.getElementById("ans2");
36    const ans3 = document.getElementById("ans3");
37
38    function quizSet(){
39        monndai.textContent = question[quizCnt][0];
40        ans1.textContent = question[quizCnt][1];
41        ans2.textContent = question[quizCnt][2];
42        ans3.textContent = question[quizCnt][3];
43    }
44
45    quizSet();
46
47    function answerCh(ans){
48        if(ans == question[quizCnt][4]){
49            alert("正解");
50            correct++;
51        } else {
52            alert("不正解");
53        }
54        quizCnt++;
55        if(quizCnt == question.length){
56        monndai.textContent = '正解数は'+ correct +'つでした。';
57        ans1.textContent = "";
58        ans2.textContent = "";
59        ans3.textContent = "";
60        btnbox.style.display = "none";
61        } else {
62            quizSet();
63        }
64    }
65    function back(){
66    quiz.style.display = "none";
67    btnbox.style.display = "none";
68    backbutton.style.display = "none";
69    main.style.display = "block";
70    scores.style.display = "none";
71    home.style.display = "block";
72    sansyou.style.display = "block";
73    quizCnt = 0;
74    quizSet();
75}
76
77function toscore() {
78    main.style.display = "none";
79    scores.style.display = "block";
80    home.style.display = "none";
81    sansyou.style.display = "none";
82}
83
84function toMain() {
85    main.style.display = "block";
86    scores.style.display = "none";
87    home.style.display = "block";
88    sansyou.style.display = "block";
89}
90

HTML
1<body>
2    <div class="main" id="main">
3    <h1>quiz challenge</h1>
4    <button class = "scorebutton" onclick = "toscore()">everyone's score</button>
5    <button class = "startbutton" onclick = "startGame()">start</button>
6    </div>
7    </div>
8    <div id="quiz" class="quiz">
9        <h1 class="quizmei">quiz</h1>
10        <h2 class="qusstion" id="question">ここに問題</h2>
11        <ul>
12            <li id="ans1">1.</li>
13            <li id="ans2">2.</li>
14            <li id="ans3">3.</li>
15        </ul>
16    </div>
17    <div class="btn-box" id="btn-box">
18        <button id="answer1" onclick="answerCh(1)">answer1</button>
19        <button id="answer2" onclick="answerCh(2)">answer2</button>
20        <button id="answer3" onclick="answerCh(3)">answer3</button>
21    </div>
22    <br>
23    <br>
24    <button id="backbutton" class = "backbutton" onclick = "back()">back</button>
25      <div class="score" id="score"></div>
26    <div id="scores">
27    <button onclick="toMain()">back</button>
28    <div class="title">
29      みんなのスコア
30    </div>
31    <table id="scoreTable">
32      <tr>
33        <td class="rank">player1: </td>
34        <td id= "score_1">-</td>
35      </tr>
36      <tr>
37        <td class="rank">player2: </td>
38        <td id = "score_2">-</td>
39      </tr>
40      <tr>
41        <td class="rank">player3: </td>
42        <td id = "score_3">-</td>
43      </tr>
44      <tr>
45        <td class="rank">player4: </td>
46        <td id = "score_4">-</td>
47      </tr>
48      <tr>
49        <td class="rank">player5: </td>
50        <td id = "score_5">-</td>
51      </tr>
52    </table>
53    </div>
54    <br>
55    <br>
56    <br>
57    <br>
58    <br>
59    <br>
60    <br>
61    <div id="home">
62        <button class="home" onclick="location.href='index.html'">home</button>
63    </div>
64    <br>
65    <br>
66    <br>
67    <br>
68    <br>
69    <br>
70    <br>
71    <br>
72        <script src="js/quiz.js"></script>
73        <script src="js/ncmb.min.js"></script>
74</body>

試したこと・調べたこと

teratailやGoogle等で検索した
ソースコードを自分なりに変更した
知人に聞いた
その他

上記の詳細・結果

学校の授業で
const APP_KEY = "*****";
const CLIENT_KEY = "****";
const ncmb = new NCMB(APP_KEY, CLIENT_KEY);

async function saveScore (score) {
let myClass = ncmb.DataStore("******");
let mc = new myClass();
mc.set("score", parseInt(score));
mc.save();
}
こんな感じで書いてありこれをベースに改良してみたけどうまくいかなかった。