diff --git a/src/core/devtools/layer.cpp b/src/core/devtools/layer.cpp
index 6f163b4f5..0c5993632 100644
--- a/src/core/devtools/layer.cpp
+++ b/src/core/devtools/layer.cpp
@@ -3,7 +3,7 @@
 
 #include "layer.h"
 
-#include <imgui.h>
+#include "SDL3/SDL_events.h"
 
 #include "SDL3/SDL_log.h"
 #include "common/config.h"
@@ -30,7 +30,7 @@ static bool show_simple_fps = false;
 static bool visibility_toggled = false;
 
 static bool show_fullscreen_tip = true;
-static float fullscreen_tip_timer = 5.0f;
+static float fullscreen_tip_timer = 8.0f;
 
 static float fps_scale = 1.0f;
 static int dump_frame_count = 1;
@@ -362,6 +362,11 @@ void L::SetupSettings() {
 void L::Draw() {
     const auto io = GetIO();
     PushID("DevtoolsLayer");
+    if (IsKeyPressed(ImGuiKey_F4, false)) {
+        SDL_Event quitEvent;
+        quitEvent.type = SDL_EVENT_QUIT;
+        SDL_PushEvent(&quitEvent);
+    }
 
     if (show_fullscreen_tip) {
         fullscreen_tip_timer -= io.DeltaTime;
@@ -371,8 +376,10 @@ void L::Draw() {
             // Display the fullscreen tip near the top-left corner, below pause message if needed
             ImVec2 pos(10, 30); // adjust Y so it doesn't overlap pause text at y=10
             ImU32 color = IM_COL32(255, 255, 255, 255);
-            ImGui::GetForegroundDrawList()->AddText(
-                pos, color, "Press F11 to toggle FullScreen and F9 to Pause Emulation");
+            ImGui::GetForegroundDrawList()->AddText(pos, color,
+                                                    "Press F11 to toggle FullScreen\n"
+                                                    "F9 to Pause Emulation\n"
+                                                    "F4 to Stop Game");
         }
     }
     if (!DebugState.IsGuestThreadsPaused()) {
@@ -452,4 +459,4 @@ void L::Draw() {
     }
 
     PopID();
-}
+}
\ No newline at end of file
diff --git a/src/qt_gui/main_window.cpp b/src/qt_gui/main_window.cpp
index 8390ee5a1..403bad354 100644
--- a/src/qt_gui/main_window.cpp
+++ b/src/qt_gui/main_window.cpp
@@ -801,6 +801,12 @@ void MainWindow::CreateConnects() {
 }
 
 void MainWindow::StartGame() {
+    if (isGameRunning) {
+        QMessageBox::critical(nullptr, tr("Run Game"), tr("Game is already running!"));
+        return;
+    }
+
+    isGameRunning = false;
     BackgroundMusicPlayer::getInstance().stopMusic();
     QString gamePath = "";
     int table_mode = m_gui_settings->GetValue(gui::gl_mode).toInt();