diff --git a/public/scenes/demo.json b/public/scenes/demo.json
index ec3f471..7eb38b8 100644
--- a/public/scenes/demo.json
+++ b/public/scenes/demo.json
@@ -12,6 +12,7 @@
         {
           "text": "走向左边那扇发光的门",
           "targetScene": "left_door",
+          "timeLimit": 15,
           "effects": [
             { "type": "add", "target": "courage", "value": 10 }
           ]