diff --git a/.github/workflows/build.yml b/.gitea/workflows/build.yml
similarity index 100%
rename from .github/workflows/build.yml
rename to .gitea/workflows/build.yml
diff --git a/GEMINI.md b/GEMINI.md
index 18d2c04..ad59810 100644
--- a/GEMINI.md
+++ b/GEMINI.md
@@ -16,6 +16,7 @@ The project uses Gradle.
 *   **Dependency Injection:** Uses `avaje-inject`. Components are marked with `@Component` and injected via constructor.
 *   **Boilerplate:** Uses `lombok` for boilerplate reduction.
 *   **Rendering:** Built on LibGDX. Main entry point is `DiceOS.java` which extends `ApplicationAdapter`.
+*   **Asset Loading:** All assets, including textures, fonts, and NinePatches, must be loaded via the `ResourceLoader` service to ensure proper lifecycle management and caching.
 *   **Project Structure:**
     *   `src/main/java/be/seeseemelk/diceos/system`: Core OS services (Display, Window, Input, etc.).
     *   `src/main/resources`: Assets (backgrounds, system textures, fonts).
diff --git a/src/main/java/be/seeseemelk/diceos/system/DiceOS.java b/src/main/java/be/seeseemelk/diceos/system/DiceOS.java
index 64d204a..bb0546c 100644
--- a/src/main/java/be/seeseemelk/diceos/system/DiceOS.java
+++ b/src/main/java/be/seeseemelk/diceos/system/DiceOS.java
@@ -2,6 +2,7 @@ package be.seeseemelk.diceos.system;
 
 import be.seeseemelk.diceos.system.gfx.GraphicsContext;
 import com.badlogic.gdx.ApplicationAdapter;
+import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.BitmapFont;
@@ -71,6 +72,10 @@ public class DiceOS extends ApplicationAdapter {
 
     @Override
     public void render() {
+        int mouseX = Gdx.input.getX();
+        int mouseY = display.getHeight() - Gdx.input.getY();
+        windowService.update(mouseX, mouseY, Gdx.input.isTouched());
+
         cursorService.updateCursor();
 
         ScreenUtils.clear(Color.BLACK);
@@ -84,6 +89,9 @@ public class DiceOS extends ApplicationAdapter {
         // Render background
         gc.draw(clouds, 0, 0);
 
+        // Render windows
+        windowService.render(gc);
+
         gc.scissor(0, 0, gc.getWidth(), gc.getHeight(), windowService::paint);
 
         // Render borders
diff --git a/src/main/java/be/seeseemelk/diceos/system/WindowService.java b/src/main/java/be/seeseemelk/diceos/system/WindowService.java
index 36c92b5..3bd5bde 100644
--- a/src/main/java/be/seeseemelk/diceos/system/WindowService.java
+++ b/src/main/java/be/seeseemelk/diceos/system/WindowService.java
@@ -2,26 +2,49 @@ package be.seeseemelk.diceos.system;
 
 import be.seeseemelk.diceos.system.gfx.GraphicsContext;
 import be.seeseemelk.diceos.system.toolkit.Menubar;
+import be.seeseemelk.diceos.system.toolkit.Window;
 import com.badlogic.gdx.graphics.g2d.NinePatch;
 import io.avaje.inject.Component;
 import lombok.RequiredArgsConstructor;
 
+import java.util.ArrayList;
+import java.util.List;
+
 @RequiredArgsConstructor
 @Component
 public class WindowService implements OnStartup {
     private final ResourceLoader resourceLoader;
+    private final List<Window> windows = new ArrayList<>();
     private NinePatch menubar;
+    private NinePatch windowDecoration;
     private Menubar systemMenubar;
 
     @Override
     public void onStartup() {
         menubar = resourceLoader.loadNinePatch("system/menubar.png");
+        windowDecoration = resourceLoader.loadNinePatch("system/window.png");
 
         systemMenubar = new Menubar()
                 .addItem("Dice")
                 .addItem("System");
     }
 
+    public void spawnWindow(int x, int y, int width, int height) {
+        windows.add(new Window(x, y, width, height, windowDecoration));
+    }
+
+    public void update(int mouseX, int mouseY, boolean isTouched) {
+        for (Window window : windows) {
+            window.handleInput(mouseX, mouseY, isTouched);
+        }
+    }
+
+    public void render(GraphicsContext gc) {
+        for (Window window : windows) {
+            window.paint(gc);
+        }
+    }
+
     void paint(GraphicsContext gc) {
         // Render menubar
         gc.draw(menubar, 0, 0, gc.getWidth(), 14);
diff --git a/src/main/java/be/seeseemelk/diceos/system/toolkit/Window.java b/src/main/java/be/seeseemelk/diceos/system/toolkit/Window.java
index 6b0f619..65b224f 100644
--- a/src/main/java/be/seeseemelk/diceos/system/toolkit/Window.java
+++ b/src/main/java/be/seeseemelk/diceos/system/toolkit/Window.java
@@ -1,6 +1,7 @@
 package be.seeseemelk.diceos.system.toolkit;
 
 import be.seeseemelk.diceos.system.gfx.GraphicsContext;
+import com.badlogic.gdx.graphics.g2d.NinePatch;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -8,9 +9,43 @@ import lombok.Setter;
 @Getter
 public class Window extends Container {
     private String title;
+    private int x, y, width, height;
+    private boolean active;
+    private NinePatch decoration;
+
+    public Window(int x, int y, int width, int height, NinePatch decoration) {
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+        this.decoration = decoration;
+    }
+
+    private int dragOffsetX, dragOffsetY;
+    private boolean isDragging;
+
+    public void handleInput(int mouseX, int mouseY, boolean isTouched) {
+        if (isTouched) {
+            if (!isDragging && isHovered(mouseX, mouseY)) {
+                isDragging = true;
+                dragOffsetX = mouseX - x;
+                dragOffsetY = mouseY - y;
+            }
+        } else {
+            isDragging = false;
+        }
+
+        if (isDragging) {
+            x = mouseX - dragOffsetX;
+            y = mouseY - dragOffsetY;
+        }
+    }
 
     @Override
     public void paint(GraphicsContext gc) {
+        if (decoration != null) {
+            decoration.draw(gc.getBatch(), x, y, width, height);
+        }
         super.paint(gc);
     }
 }