diff --git a/extra/js/drive.js b/extra/js/drive.js
index ab27304..839cd77 100644
--- a/extra/js/drive.js
+++ b/extra/js/drive.js
@@ -135,18 +135,18 @@ var createDummies = function() {
     FS.mkdir('/game');
 
     // Create dummy objects
-    Object.values(mapping).forEach((file) => {
+    for (var i = 0; i < mappingArray.length; i++) {
         // Get filename
+        const file = mappingArray[i][1];
         const filename = '/game/' + file.split("?")[0];
 
         // Check if folder
         if (file.endsWith('h=')) {
-            return FS.mkdir(filename);
+            FS.mkdir(filename);
+        } else {
+            FS.writeFile(filename, '1');
         }
-
-        // Create dummy file
-        FS.writeFile(filename, '1');
-    });
+    }
 };
 
 window.setBusy = function() {
diff --git a/extra/make_mapping.sh b/extra/make_mapping.sh
index 29cce7a..81f6e46 100755
--- a/extra/make_mapping.sh
+++ b/extra/make_mapping.sh
@@ -1,10 +1,10 @@
 #!/bin/bash
 
-echo "var mapping = {" > mapping.js
+echo "var mappingArray = [" > mapping.js
 echo "var bitmapSizeMapping = {" > bitmap-map.js
 
-for file in {*,*/*,*/**/*,*/**/**/*}
-do
+shopt -s globstar
+for file in **/*; do
 
 filename="${file%.*}"
 fl="$(echo "$filename" | tr '[:upper:]' '[:lower:]')"
@@ -27,10 +27,17 @@ else
     md5=''
 fi
 
-echo "\"$fl\": \"${file}?h=${md5}\"," >> mapping.js
+echo "[\"$fl\", \"${file}?h=${md5}\"]," >> mapping.js
 
 done
 
-echo "};" >> mapping.js
+echo "];" >> mapping.js
 echo "};" >> bitmap-map.js
 
+echo "
+var mapping = {};
+for (var i = 0; i < mappingArray.length; i++) {
+    mapping[mappingArray[i][0]] = mappingArray[i][1];
+}
+" >> mapping.js
+