diff --git a/.gitignore b/.gitignore
index f06a6b7..8c4b636 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,4 @@ imgui.ini
 .playwright-mcp/
 Vulkan-Guide/
 cortex.mp4
+cortex.mp4
diff --git a/README.md b/README.md
index 29dc73f..62678d0 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 AI-Native 3D game engine with pure P/Invoke Vulkan 1.3 render backend.
 
+![Cortex Engine Demo](cortex_demo.gif)
+
 ## Features
 
 - **Vulkan 1.3** — dynamic rendering, synchronization2, pure P/Invoke (no wrapper libraries)
diff --git a/cortex_demo.gif b/cortex_demo.gif
new file mode 100644
index 0000000..2237325
Binary files /dev/null and b/cortex_demo.gif differ