diff --git a/base_image/startup.cfg b/base_image/startup.cfg
index d914b91..c1c4916 100644
--- a/base_image/startup.cfg
+++ b/base_image/startup.cfg
@@ -1 +1 @@
-demo    fxf
+vulpine fxf
diff --git a/build.sh b/build.sh
index 10b2700..4828deb 100755
--- a/build.sh
+++ b/build.sh
@@ -13,6 +13,9 @@ fi
 echo "assembling kernel"
 ../fox32asm/target/release/fox32asm kernel/main.asm base_image/system.bin
 
+echo "assembling vulpine"
+../fox32asm/target/release/fox32asm vulpine/main.asm base_image/vulpine.fxf
+
 echo "adding files to fox32os.img"
 cd base_image
 for file in ./*; do
diff --git a/vulpine/main.asm b/vulpine/main.asm
new file mode 100644
index 0000000..28b3590
--- /dev/null
+++ b/vulpine/main.asm
@@ -0,0 +1,83 @@
+; vulpine window manager
+
+const VULPINE_VERSION_MAJOR: 0
+const VULPINE_VERSION_MINOR: 1
+const VULPINE_VERSION_PATCH: 0
+
+entry:
+    call enable_menu_bar
+    call clear_menu_bar
+    mov r0, menu_items_root
+    mov r1, 0xFFFFFFFF
+    call draw_menu_bar_root_items
+
+draw_wallpaper:
+    ; open the wallpaper file and draw it
+    mov r0, wallpaper_file_name
+    mov r1, 0
+    mov r2, wallpaper_file_struct
+    call ryfs_open
+    cmp r0, 0
+    ifz jmp event_loop
+
+    ; read the wallpaper file directly into the background framebuffer
+    mov r0, wallpaper_file_struct
+    mov r1, 0x02000000
+    call ryfs_read_whole_file
+
+event_loop:
+    call get_next_event
+
+    ; did the user click the menu bar?
+    cmp r0, EVENT_TYPE_MENU_BAR_CLICK
+    ifz mov r0, menu_items_root
+    ifz call menu_bar_click_event
+
+    ; is the user in a menu?
+    cmp r0, EVENT_TYPE_MENU_UPDATE
+    ifz call menu_update_event
+
+    ; did the user click a menu item?
+    cmp r0, EVENT_TYPE_MENU_CLICK
+    ifz call menu_click_event
+
+    call yield_task
+    jmp event_loop
+
+menu_click_event:
+    ; r2 contains the clicked root menu
+    ; r3 contains the clicked menu item
+
+    ; system
+    cmp r2, 0
+    ifz call system_menu_click_event
+
+    ret
+
+system_menu_click_event:
+    ; r2 contains the clicked root menu
+    ; r3 contains the clicked menu item
+
+    ; shut down
+    cmp r3, 0
+    ifz icl
+    ifz halt
+
+    ret
+
+wallpaper_file_name: data.str "wallpaprraw"
+wallpaper_file_struct: data.32 0 data.32 0
+
+menu_items_root:
+    data.8 1                                                      ; number of menus
+    data.32 menu_items_system_list data.32 menu_items_system_name ; pointer to menu list, pointer to menu name
+menu_items_system_name:
+    data.8 6  data.str "System"    data.8 0x00   ; text length, text, null-terminator
+menu_items_system_list:
+    data.8 1                                     ; number of items
+    data.8 11                                    ; menu width (usually longest item + 2)
+    data.8 9  data.str "Shut Down" data.8 0x00   ; text length, text, null-terminator
+
+    ; include system defs
+    #include "../../fox32rom/fox32rom.def"
+    #include "../fox32os.def"