diff --git a/game.js b/game.js
new file mode 100644
index 0000000..d3f2f76
--- /dev/null
+++ b/game.js
@@ -0,0 +1,166 @@
+function deadEnd1() {
+    document.getElementById('room').innerHTML = '行き止まり';
+    document.getElementById('image').setAttribute('src', 'clickable4.jpg');
+    document.getElementById('door1').removeAttribute('coords');
+    document.getElementById('door2').removeAttribute('coords');
+    document.getElementById('door3').removeAttribute('coords');
+    document.getElementById('back').setAttribute('coords', '231,298,231,330,221,330,241,353,261,331,251,331,251,298');
+    document.getElementById('back').setAttribute('onclick', 'back1()');
+}
+
+function deadEnd2() {
+    document.getElementById('room').innerHTML = '行き止まり';
+    document.getElementById('image').setAttribute('src', 'clickable4.jpg');
+    document.getElementById('door1').removeAttribute('coords');
+    document.getElementById('door2').removeAttribute('coords');
+    document.getElementById('door3').removeAttribute('coords');
+    document.getElementById('back').setAttribute('onclick', 'back2()');
+}
+
+function deadEnd3() {
+    document.getElementById('room').innerHTML = '行き止まり';
+    document.getElementById('image').setAttribute('src', 'clickable4.jpg');
+    document.getElementById('door1').removeAttribute('coords');
+    document.getElementById('door2').removeAttribute('coords');
+    document.getElementById('door3').removeAttribute('coords');
+    document.getElementById('back').setAttribute('onclick', 'back3()');
+}
+
+function deadEndNazo2() {
+    document.getElementById('room').innerHTML = '行き止まり';
+    document.getElementById('image').setAttribute('src', 'nazo-memo1.png');
+    document.getElementById('nazo').setAttribute('href', 'nazo1.png');
+    document.getElementById('nazo').setAttribute('data-lightbox', 'group');
+    document.getElementById('door1').removeAttribute('coords');
+    document.getElementById('door2').removeAttribute('coords');
+    document.getElementById('door3').removeAttribute('coords');
+    document.getElementById('back').setAttribute('onclick', 'back2()');
+}
+
+function deadEndNazo3() {
+    document.getElementById('room').innerHTML = '行き止まり';
+    document.getElementById('image').setAttribute('src', 'nazo-memo1.png');
+    document.getElementById('nazo').setAttribute('href', 'nazo1.png');
+    document.getElementById('nazo').setAttribute('data-lightbox', 'group');
+    document.getElementById('door1').removeAttribute('coords');
+    document.getElementById('door2').removeAttribute('coords');
+    document.getElementById('door3').removeAttribute('coords');
+    document.getElementById('back').setAttribute('onclick', 'back3()');
+}
+
+function back1() {
+    document.getElementById('room').innerHTML = '1つ目の部屋';
+    document.getElementById('image').setAttribute('src', 'clickable1.jpg');
+    document.getElementById('door1').setAttribute('coords', '104,112,3,60,3,343,103,273');
+    document.getElementById('door1').setAttribute('onclick', 'deadEnd1()');
+    document.getElementById('door2').setAttribute('coords', '215,135,265,241');
+    document.getElementById('door2').setAttribute('onclick', 'deadEnd1()');
+    document.getElementById('door3').setAttribute('coords', '375,112,479,57,478,339,375,271');
+    document.getElementById('door3').setAttribute('onclick', 'back2()');
+    document.getElementById('back').removeAttribute('coords');
+}
+
+function back2() {
+    document.getElementById('room').innerHTML = '2つ目の部屋';
+    document.getElementById('image').setAttribute('src', 'clickable2.jpg');
+    document.getElementById('nazo').removeAttribute('href');
+    document.getElementById('nazo').removeAttribute('data-lightbox');
+    document.getElementById('door1').setAttribute('coords', '104,112,3,60,3,343,103,273');
+    document.getElementById('door1').setAttribute('onclick', 'back3()');
+    document.getElementById('door2').setAttribute('coords', '215,135,265,241');
+    document.getElementById('door2').setAttribute('onclick', 'deadEndNazo2()');
+    document.getElementById('door3').setAttribute('coords', '375,112,479,57,478,339,375,271');
+    document.getElementById('door3').setAttribute('onclick', 'deadEnd2()');
+    document.getElementById('back').setAttribute('coords', '231,298,231,330,221,330,241,353,261,331,251,331,251,298');
+    document.getElementById('back').setAttribute('onclick', 'back1()');
+}
+
+function back3() {
+    document.getElementById('room').innerHTML = '3つ目の部屋';
+    document.getElementById('image').setAttribute('src', 'clickable3.jpg');
+    document.getElementById('nazo').removeAttribute('href');
+    document.getElementById('nazo').removeAttribute('data-lightbox');
+    document.getElementById('door1').setAttribute('coords', '104,112,3,60,3,343,103,273');
+    document.getElementById('door1').setAttribute('onclick', 'success()');
+    document.getElementById('door2').setAttribute('coords', '215,135,265,241');
+    document.getElementById('door2').setAttribute('onclick', 'deadEnd3()');
+    document.getElementById('door3').setAttribute('coords', '375,112,479,57,478,339,375,271');
+    document.getElementById('door3').setAttribute('onclick', 'deadEndNazo3()');
+    document.getElementById('back').setAttribute('onclick', 'back2()');
+}
+
+function success() {
+    document.getElementById('room').innerHTML = '脱出成功!!';
+    document.getElementById('room').setAttribute('class', 'success');
+    document.getElementById('image').removeAttribute('src');
+    document.getElementById('image').removeAttribute('alt');
+    document.getElementById('room').setAttribute('class', 'success');
+    var replay = document.createElement('a');
+    replay.textContent = 'もう一度プレイする';
+    replay.setAttribute('class', 'replay');
+    replay.setAttribute('href', 'home.html');
+    document.getElementById('room').after(replay);
+    var thank = document.createElement('p');
+    thank.textContent = 'Thank you for playing!!';
+    thank.setAttribute('class', 'thank');
+    document.getElementById('room').after(thank);
+}
+
+$(window).on('keydown', function(e) {
+    if(e.keyCode === 37) { // ←
+        focus_prev();
+        return false;
+    }
+    if(e.keyCode === 39) { // →
+        focus_next();
+        return false;
+    }
+});
+ 
+// フォーカスを前に移動する
+function focus_prev() {
+    // 現在のフォーカスを取得
+    var currentFocusIndex = $('area').index($(':focus'));
+ 
+    if(currentFocusIndex > -1) {
+        for (var i = 0; i < $('area').length; i++) {
+            if(i === currentFocusIndex && i > 0) {
+                $('area').eq(i - 1).focus();
+            }
+        }
+    }
+}
+ 
+// フォーカスを次に移動する
+function focus_next() {
+    // 現在のフォーカスを取得
+    var currentFocusIndex = $('area').index($(':focus'));
+ 
+    if(currentFocusIndex > -1) {
+        for (var i = 0; i < $('area').length; i++) {
+            if(i === currentFocusIndex && i < $('area').length - 1) {
+                $('area').eq(i + 1).focus();
+            }
+        }
+    } else {
+        $('area').eq(0).focus();
+    }
+}
+
+$(document).ready(function() {
+    $('#door1, #door2').keydown(function(event) {
+        if (event.which === 13) {
+            $('#door1, #door2').click(deadEnd1());
+        }
+    });
+    $('#door3').keydown(function(event) {
+        if (event.which === 13) {
+            $('#door3').click(back2());
+        }
+    });
+    $('#back').keyup(function(event) {
+        if (event.which === 13) {
+            $('#back').click(back1());
+        }
+    });
+});
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