diff --git a/QtScrcpy/devicemanage/devicemanage.cpp b/QtScrcpy/devicemanage/devicemanage.cpp
index 646becc..decce90 100644
--- a/QtScrcpy/devicemanage/devicemanage.cpp
+++ b/QtScrcpy/devicemanage/devicemanage.cpp
@@ -49,6 +49,10 @@ bool DeviceManage::connectDevice(Device::DeviceParams params)
 
 void DeviceManage::updateScript(QString script)
 {
+    if (m_devices.isEmpty()) {
+        qWarning() << "no device connect!!!";
+        return;
+    }
     QMapIterator<QString, QPointer<Device>> i(m_devices);
     while (i.hasNext()) {
         i.next();
diff --git a/QtScrcpy/dialog.cpp b/QtScrcpy/dialog.cpp
index da5991d..c9d8be0 100644
--- a/QtScrcpy/dialog.cpp
+++ b/QtScrcpy/dialog.cpp
@@ -91,11 +91,6 @@ void Dialog::initUI()
     ui->formatBox->addItem("mp4");
     ui->formatBox->addItem("mkv");
 
-#ifndef Q_OS_WIN32
-    // game only windows
-    ui->gameCheck->setEnabled(false);
-#endif
-
     ui->recordPathEdt->setText(Config::getInstance().getRecordPath());
 }
 
@@ -155,18 +150,12 @@ void Dialog::on_startServerBtn_clicked()
     params.maxSize = videoSize;
     params.bitRate = bitRate;
     // on devices with Android >= 10, the capture frame rate can be limited
-    params.maxFps = Config::getInstance().getMaxFps();
+    params.maxFps = static_cast<quint32>(Config::getInstance().getMaxFps());
     params.recordFileName = absFilePath;
     params.closeScreen = ui->closeScreenCheck->isChecked();
     params.useReverse = ui->useReverseCheck->isChecked();
     params.display = !ui->notDisplayCheck->isChecked();
-    if (ui->gameCheck->isChecked()) {
-        if (ui->gameBox->currentText().isEmpty()) {
-            outLog("no keymap script selected", true);
-        } else {
-            params.gameScript = getGameScript(ui->gameBox->currentText());
-        }
-    }
+
     m_deviceManage.connectDevice(params);
 
 /*
diff --git a/QtScrcpy/dialog.ui b/QtScrcpy/dialog.ui
index 514e54e..98ce0c8 100644
--- a/QtScrcpy/dialog.ui
+++ b/QtScrcpy/dialog.ui
@@ -304,13 +304,6 @@
         </property>
        </widget>
       </item>
-      <item row="3" column="10" colspan="2">
-       <widget class="QCheckBox" name="gameCheck">
-        <property name="text">
-         <string>auto enable</string>
-        </property>
-       </widget>
-      </item>
       <item row="2" column="3" colspan="2">
        <widget class="QCheckBox" name="alwaysTopCheck">
         <property name="sizePolicy">
diff --git a/QtScrcpy/main.cpp b/QtScrcpy/main.cpp
index 63d9ad1..833b047 100644
--- a/QtScrcpy/main.cpp
+++ b/QtScrcpy/main.cpp
@@ -10,9 +10,9 @@
 #include "mousetap/mousetap.h"
 #include "config.h"
 
-Dialog* g_mainDlg = Q_NULLPTR;
+static Dialog* g_mainDlg = Q_NULLPTR;
 
-QtMessageHandler g_oldMessageHandler = Q_NULLPTR;
+static QtMessageHandler g_oldMessageHandler = Q_NULLPTR;
 void myMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg);
 void installTranslator();
 
diff --git a/README.md b/README.md
index 4e8ca9f..0f6b2cd 100644
--- a/README.md
+++ b/README.md
@@ -42,8 +42,9 @@ Here is the instruction of adding new customized mapping files.
 
 - Write a customized script and put it in the `keymap` directory
 - Click `refresh script` to check whether it can be found
+- Select your script
 - Connect your phone, start service and click `apply`
-- Start the game and press `~` key (left side of the number key 1) to switch to the mapping mode (It can be changed in the script as `switchkey`)
+- Press `~` key (left side of the number key 1) to switch to the custom mapping mode (It can be changed in the script as `switchkey`)
 - Press the ~ key again to switch back to normal mode
 - (For PUBG and similar games) If you want to drive cars with WASD, you need to check the `single rocker mode` in the game setting.
 
diff --git a/README_zh.md b/README_zh.md
index a2864ff..4afff4c 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -42,8 +42,9 @@ QtScrcpy可以通过USB(或通过TCP/IP)连接Android设备，并进行显示和
 自定义按键映射操作方法如下：
 - 编写自定义脚本放入keymap目录
 - 点击刷新脚本，确保脚本可以被检测到
+- 选择需要的脚本
 - 连接手机并启动服务之后，点击应用脚本
-- 进入游戏场景，按~键（数字键1左边）切换为游戏映射模式即可体验（具体按什么键要看你按键脚本定义的switchKey）
+- 按~键（数字键1左边）切换为自定义映射模式即可体验（具体按什么键要看你按键脚本定义的switchKey）
 - 再次按~键切换为正常控制模式
 - 要想wasd控制开车记得在载具设置中设置为单摇杆模式