diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..1e7a990
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "shared-modules"]
+	path = shared-modules
+	url = https://github.com/flathub/shared-modules.git
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8f4985d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,17 @@
+To copy configuration:
+```
+mkdir -p ~/.supermodel/Analysis/
+mkdir -p ~/.supermodel/Assets/
+mkdir -p ~/.supermodel/Config/
+mkdir -p ~/.supermodel/Log/
+mkdir -p ~/.supermodel/NVRAM/
+mkdir -p ~/.supermodel/Saves/
+mkdir -p ~/.supermodel/Screenshots/
+cp -r ~/.local/share/flatpak/app/com.supermodel3.Supermodel/current/active/files/Assets ~/.supermodel/
+cp ~/.local/share/flatpak/app/com.supermodel3.Supermodel/current/active/files/Config/Games.xml ~/.supermodel/Config/
+cp -n ~/.local/share/flatpak/app/com.supermodel3.Supermodel/current/active/files/Config/Supermodel.ini ~/.supermodel/Config/
+```
+To run from a terminal:
+```
+flatpak run com.supermodel3.Supermodel <romset>
+```
diff --git a/com.supermodel3.Supermodel.metainfo.xml b/com.supermodel3.Supermodel.metainfo.xml
new file mode 100644
index 0000000..da30b69
--- /dev/null
+++ b/com.supermodel3.Supermodel.metainfo.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>com.supermodel3.Supermodel</id>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0-or-later</project_license>
+  <name>Supermodel</name>
+  <summary>
+    A Sega Model 3 Arcade Emulator.
+  </summary>
+  <description>
+    <p>
+      Supermodel emulates Sega&apos;s Model 3 arcade platform,
+      allowing you to play a number of ground-breaking arcade classics on your PC.
+      It uses OpenGL and the SDL library, and can run on Windows, Linux, and Mac OS X.
+      The source code is freely available under the terms of the GNU General Public License.
+    </p>
+  </description>
+  <categories>
+    <category>Game</category>
+    <category>ArcadeGame</category>
+    <category>Emulator</category>
+  </categories>
+  <url type="homepage">https://www.supermodel3.com</url>
+  <launchable type="desktop-id">com.supermodel3.Supermodel.desktop</launchable>
+  <releases>
+    <release version="0.3a-WIP" date="2023-04-01"/>
+  </releases>
+  <provides>
+    <binary>supermodel</binary>
+  </provides>
+  <content_rating type="oars-1.0" />
+  <screenshots>
+    <screenshot type="default">
+        <image type="source" width="1024" height="723">https://www.supermodel3.com/Images/Dayto2PE_InYourFace_1024x723_Low.jpg</image>
+    </screenshot>
+  </screenshots>
+</component>
diff --git a/com.supermodel3.Supermodel.yaml b/com.supermodel3.Supermodel.yaml
new file mode 100644
index 0000000..ab15e7b
--- /dev/null
+++ b/com.supermodel3.Supermodel.yaml
@@ -0,0 +1,38 @@
+id: com.supermodel3.Supermodel
+runtime: org.freedesktop.Platform
+runtime-version: "22.08"
+sdk: org.freedesktop.Sdk
+command: supermodel
+separate-locales: false
+finish-args:
+  - --device=all
+  - --persist=.supermodel
+  - --filesystem=host:ro
+  - --share=network
+  - --share=ipc
+  - --socket=fallback-x11
+  - --socket=pulseaudio
+  - --socket=wayland
+  - --allow=bluetooth
+modules:
+  - shared-modules/glu/glu-9.json
+
+  - name: supermodel
+    buildsystem: simple
+    build-commands:
+      - make
+          -f Makefiles/Makefile.UNIX
+          NET_BOARD=1
+      - install -Dm 0755 bin/supermodel ${FLATPAK_DEST}/bin/supermodel
+      - install -Dm 0644 ${FLATPAK_ID}.metainfo.xml ${FLATPAK_DEST}/share/metainfo/${FLATPAK_ID}.metainfo.xml
+      - cp -r Assets ${FLATPAK_DEST}
+      - cp -r Config ${FLATPAK_DEST}
+    sources:
+      - type: git
+        url: https://github.com/trzy/Supermodel.git
+        branch: master
+        commit: 6993dfcfb0ebe369f246ff50e3669d4557a527da
+      - type: file
+        path: com.supermodel3.Supermodel.metainfo.xml
+      - type: patch
+        path: ldflags.patch
diff --git a/ldflags.patch b/ldflags.patch
new file mode 100644
index 0000000..15021bb
--- /dev/null
+++ b/ldflags.patch
@@ -0,0 +1,78 @@
+diff --git a/Makefiles/Makefile.UNIX b/Makefiles/Makefile.UNIX
+index 1e48361..1e7577d 100644
+--- a/Makefiles/Makefile.UNIX
++++ b/Makefiles/Makefile.UNIX
+@@ -27,13 +27,13 @@
+ 
+ 
+ ###############################################################################
+-# Build Options
+-###############################################################################
+-
+-DELETE = rm -d -r -f
+-
+-
+-###############################################################################
++# Build Options
++###############################################################################
++
++DELETE = rm -d -r -f
++
++
++###############################################################################
+ # Platform Configuration
+ #
+ # Edit library and include paths as needed.
+@@ -53,29 +53,29 @@ LD = gcc
+ 
+ #
+ # SDL
+-#
+-
+-SDL2_CFLAGS = `sdl2-config --cflags`
+-SDL2_LIBS = `sdl2-config --libs`
+-
+-#
+-#	UNIX-specific
+-#
+-
+-PLATFORM_CXXFLAGS = $(SDL2_CFLAGS) -O3
+-PLATFORM_LDFLAGS = $(SDL2_LIBS) -lGL -lGLU -lz -lm -lstdc++ -lpthread -lSDL2_net
+-
+-
+-###############################################################################
+-# Core Makefile
+-###############################################################################
++#
++
++SDL2_CFLAGS = `sdl2-config --cflags`
++SDL2_LIBS = `sdl2-config --libs`
++
++#
++#	UNIX-specific
++#
++
++PLATFORM_CXXFLAGS = $(SDL2_CFLAGS) -O3
++PLATFORM_LDFLAGS = $(SDL2_LIBS) -lGL -lGLU -lz -lm -lstdc++ -lpthread -lSDL2_net -L/app/lib
++
++
++###############################################################################
++# Core Makefile
++###############################################################################
+ 
+ PLATFORM_SRC_FILES = \
+ 	Src/OSD/Unix/FileSystemPath.cpp
+-
+-include Makefiles/Rules.inc
+-
+-clean:
+-	$(SILENT)echo Cleaning up \"$(BIN_DIR)\" and \"$(OBJ_DIR)\"...
+-	$(SILENT)$(DELETE) $(BIN_DIR)
+-	$(SILENT)$(DELETE) $(OBJ_DIR)
++
++include Makefiles/Rules.inc
++
++clean:
++	$(SILENT)echo Cleaning up \"$(BIN_DIR)\" and \"$(OBJ_DIR)\"...
++	$(SILENT)$(DELETE) $(BIN_DIR)
++	$(SILENT)$(DELETE) $(OBJ_DIR)
diff --git a/shared-modules b/shared-modules
new file mode 160000
index 0000000..a2441b9
--- /dev/null
+++ b/shared-modules
@@ -0,0 +1 @@
+Subproject commit a2441b964afefd8cd1cebcdf562c7878670daf42