diff --git a/quests/copy/game.yml b/quests/copy/game.yml
index 15eda11..d48d0e8 100644
--- a/quests/copy/game.yml
+++ b/quests/copy/game.yml
@@ -9,6 +9,14 @@ requirements:
   - create
 
 stages:
+  - id: warning-01
+    repeatable: true
+    condition:
+      command:
+        - '　'
+    hints:
+      - '!! 請勿使用全形空格 !!'
+
   - id: start
     task: 輸入 `echo start` 來開始
     condition:
diff --git a/quests/create/game.yml b/quests/create/game.yml
index 5842342..07d2d4f 100644
--- a/quests/create/game.yml
+++ b/quests/create/game.yml
@@ -10,6 +10,14 @@ requirements:
   - read
 
 stages:
+  - id: warning-01
+    repeatable: true
+    condition:
+      command:
+        - '　'
+    hints:
+      - '!! 請勿使用全形空格 !!'
+
   - id: start
     task: 輸入 `echo start` 來開始
     condition:
diff --git a/quests/meta.yml b/quests/meta.yml
deleted file mode 100644
index 5e7ed1b..0000000
--- a/quests/meta.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-quests:
-  - get-started
-
-  - cast
-  - explore
-
-  - path
-
-  - read
-
-  - create
-
-  - copy
-  - move
-
-  - remove
-
-  - hello-world
diff --git a/quests/move/game.yml b/quests/move/game.yml
index 413bc35..f694ae6 100644
--- a/quests/move/game.yml
+++ b/quests/move/game.yml
@@ -9,6 +9,14 @@ requirements:
   - create
 
 stages:
+  - id: warning-01
+    repeatable: true
+    condition:
+      command:
+        - '　'
+    hints:
+      - '!! 請勿使用全形空格 !!'
+
   - id: start
     task: 輸入 `echo start` 來開始
     condition:
diff --git a/quests/path/game.yml b/quests/path/game.yml
index 59de297..b01937f 100644
--- a/quests/path/game.yml
+++ b/quests/path/game.yml
@@ -31,7 +31,7 @@ stages:
           - 相對路徑是從目前所在的資料夾開始的路徑，而絕對路徑則是從根目錄開始的路徑。
           - 請你先用 `ls` 指令查看這個資料夾中的檔案。
 
-  - id: ls-~
+  - id: ls
     task: 查看資料夾中的檔案
     requirements:
       - start
@@ -47,7 +47,7 @@ stages:
   - id: cd-folder1
     task: 進入 `folder1` 資料夾
     requirements:
-      - ls-~
+      - ls
     condition:
       pwd:
         - ^/home/commander/folder1$
diff --git a/quests/remove/game.yml b/quests/remove/game.yml
index d6532fc..4560ba3 100644
--- a/quests/remove/game.yml
+++ b/quests/remove/game.yml
@@ -13,6 +13,14 @@ requirements:
   - move
 
 stages:
+  - id: warning-01
+    repeatable: true
+    condition:
+      command:
+        - '　'
+    hints:
+      - '!! 請勿使用全形空格 !!'
+
   - id: start
     task: 輸入 `echo start` 來開始
     condition: