diff --git a/abbaye2.png b/abbaye2.png
new file mode 100644
index 0000000..2c37c3a
Binary files /dev/null and b/abbaye2.png differ
diff --git a/graphics/intro-gcw.png b/graphics/intro-gcw.png
new file mode 100644
index 0000000..c34cf1d
Binary files /dev/null and b/graphics/intro-gcw.png differ
diff --git a/make_opk.sh b/make_opk.sh
new file mode 100755
index 0000000..370e3ef
--- /dev/null
+++ b/make_opk.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+OPK_NAME=abbaye.opk
+echo ${OPK_NAME}
+
+# create default.gcw0.desktop
+cat > default.gcw0.desktop <<EOF
+[Desktop Entry]
+Name=Abbaye des Morts
+Comment=Labyrinth roaming
+Exec=abbaye
+Terminal=false
+Type=Application
+StartupNotify=true
+Icon=abbaye2
+Categories=games;
+EOF
+
+# create opk
+FLIST="fonts"
+FLIST="${FLIST} graphics"
+FLIST="${FLIST} mapa"
+FLIST="${FLIST} music"
+FLIST="${FLIST} sounds"
+FLIST="${FLIST} README"
+FLIST="${FLIST} abbaye"
+FLIST="${FLIST} abbaye2.png"
+FLIST="${FLIST} default.gcw0.desktop"
+
+rm -f ${OPK_NAME}
+mksquashfs ${FLIST} ${OPK_NAME} -all-root -no-xattrs -noappend -no-exports
+
+cat default.gcw0.desktop
+rm -f default.gcw0.desktop
\ No newline at end of file
diff --git a/makefile b/makefile
index c2cb72f..b063499 100644
--- a/makefile
+++ b/makefile
@@ -1,20 +1,58 @@
-# Compilation
+#
+# use `make TARGET=gcw0` to build for GCW-Zero
+# and `make` for normal build
+#
 
-all: abbaye abbaye-pandora
+#TARGET	= gcw0
+#TARGET	= pandora
 
-abbaye: ./src/main.c ./src/barradeestado.c ./src/bosses.c ./src/enemigos.c ./src/fase.c ./src/jean.c ./src/musica.c ./src/pantallas.c ./src/comun.h
-	gcc -finline-functions -funswitch-loops -fpredictive-commoning -fgcse-after-reload -ftree-vectorize ./src/main.c ./src/barradeestado.c ./src/bosses.c ./src/enemigos.c ./src/fase.c ./src/jean.c ./src/musica.c ./src/pantallas.c -o abbaye `sdl-config --cflags --libs` -lSDL_image -lSDL_ttf -lSDL_mixer -lSDL_gfx -lm
+NAME	= abbaye
 
-abbaye-pandora: ./src/main.c ./src/barradeestado.c ./src/bosses.c ./src/enemigos.c ./src/fase.c ./src/jean.c ./src/musica.c ./src/pantallas.c ./src/comun.h
-	$(PREFIX)gcc -O3 -finline-functions -funswitch-loops -fpredictive-commoning -fgcse-after-reload -ftree-vectorize ./src/main.c ./src/barradeestado.c ./src/bosses.c ./src/enemigos.c ./src/fase.c ./src/jean.c ./src/musica.c ./src/pantallas.c -o abbaye-pandora `sdl-config --cflags --libs` -lSDL_image -lSDL_ttf -lSDL_mixer -lSDL_gfx -lm -D_OPENPANDORA
+CFLAGS	= -s -O2 `sdl-config --cflags`
+LIBS 	= -lSDL_image -lSDL_ttf -lSDL_mixer -lSDL_gfx `sdl-config --libs` -lm
+
+# assume cross-compilation
+ifeq "$(TARGET)" "gcw0"
+    CC		= mipsel-linux-gcc
+    CFLAGS	+= -mips32 -D_GCW_ZERO
+else
+ifeq "$(TARGET)" "pandora"
+    CC		= $(PREFIX)gcc
+    CFLAGS	+= -D_OPENPANDORA \
+                   -finline-functions -funswitch-loops -fpredictive-commoning \
+		   -fgcse-after-reload -ftree-vectorize
+    NAME	= abbaye-pandora
+else
+    CC		= gcc
+
+    # detect mingw and do some fixes
+    ifeq ($(OS),Windows_NT)
+        CFLAGS	+= -Dsleep=SDL_Delay -D_RUTAS_RELATIVAS
+        NAME	= abbaye.exe
+    endif
+endif
+endif
+
+SRC	= ./src/main.c \
+	  ./src/barradeestado.c \
+	  ./src/bosses.c \
+	  ./src/enemigos.c \
+	  ./src/fase.c \
+	  ./src/jean.c \
+	  ./src/musica.c \
+	  ./src/pantallas.c
+
+all: $(NAME)
+
+$(NAME): $(SRC) ./src/comun.h
+	$(CC) $(CFLAGS) $(SRC) $(LIBS) -o $(NAME)
 
 clean:
-	rm -f abbaye
-	rm -f abbaye-pandora
+	rm -f $(NAME)
 
 # Installation
 install:
-	cp abbaye /usr/bin/
+	cp $(NAME) /usr/bin/
 	cp abbaye.desktop /usr/share/applications
 	mkdir -p /usr/share/abbaye/music
 	cp ./music/* /usr/share/abbaye/music
@@ -29,7 +67,10 @@ install:
 	cp -r ./graphics/* /usr/share/abbaye/graphics
 
 uninstall:
-	rm /usr/bin/abbaye
+	rm /usr/bin/$(NAME)
 	rm /usr/share/applications/abbaye.desktop
 	rm /usr/share/pixmaps/abbaye.png
 	rm -rf /usr/share/abbaye
+
+opk:	$(NAME)
+	./make_opk.sh
\ No newline at end of file
diff --git a/src/comun.h b/src/comun.h
index f097511..b679ba7 100644
--- a/src/comun.h
+++ b/src/comun.h
@@ -3,7 +3,7 @@
 #ifndef _COMUN_H_
 #define _COMUN_H_
 
-#ifdef _OPENPANDORA
+#if defined(_OPENPANDORA) || defined (_GCW_ZERO)
 /* La versión para OpenPandora usa rutas relativas */
 #define _RUTAS_RELATIVAS
 /* La versión para OpenPandora renderiza internamente a 320x240 */
@@ -134,8 +134,25 @@
 #endif
 
 #ifdef _OPENPANDORA
-#undef RUTA_GRA_INTRO
-#define RUTA_GRA_INTRO             "graphics/intro-pandora.png"
+  #undef RUTA_GRA_INTRO
+  #define RUTA_GRA_INTRO           "graphics/intro-pandora.png"
+  #define KEY_JUMP                 SDLK_PAGEDOWN
+  #define KEY_START                SDLK_PAGEDOWN
+  #define KEY_GRAPHICS             SDLK_c
+  #define KEY_INFO                 SDLK_i
+
+#elif defined(_GCW_ZERO)
+  #undef RUTA_GRA_INTRO
+  #define RUTA_GRA_INTRO           "graphics/intro-gcw.png"
+  #define KEY_JUMP                 SDLK_LCTRL
+  #define KEY_START                SDLK_RETURN
+  #define KEY_GRAPHICS             SDLK_LALT
+  #define KEY_INFO                 SDLK_SPACE
+#else
+  #define KEY_JUMP                 SDLK_UP
+  #define KEY_START                SDLK_SPACE
+  #define KEY_GRAPHICS             SDLK_c
+  #define KEY_INFO                 SDLK_i
 #endif
 
 #endif /* _COMUN_H_ */
diff --git a/src/main.c b/src/main.c
index e99c66e..6acbe1c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,5 @@
 /* Abbaye des Morts */
-/* Version 1.0 */
+/* Version 1.13 */
 /* Port iniciado el 18/10/2012 */
 /* Version 1.0 finalizada el 28/12/2012 */
 /* Version 1.1 finalizada el 14/01/2013 */
@@ -36,6 +36,7 @@
 #include <SDL_getenv.h>
 #include "main.h"
 
+#undef main
 main () {
 
   /* Variables */
@@ -46,7 +47,7 @@ main () {
 
   /* Iniciar SDL */
   iniciar_sdl ();
-	SDL_WM_SetCaption("Abbaye des Morts - v1.11", "Abbaye des Morts");
+	SDL_WM_SetCaption("Abbaye des Morts - v1.13", "Abbaye des Morts");
 #ifdef _RENDER_320_240
   pantalla = SDL_SetVideoMode(320,240,8,SDL_HWSURFACE|SDL_DOUBLEBUF);
 #else
@@ -1222,11 +1223,7 @@ void tecladoj (struct protagonista *jean, int *tecla) {
 		if (evento.type == SDL_QUIT)
 	   	exit(0);
 		if (evento.type == SDL_KEYDOWN) {
-#ifdef _OPENPANDORA
-			if (evento.key.keysym.sym == SDLK_PAGEDOWN) {
-#else
-			if (evento.key.keysym.sym == SDLK_UP) {
-#endif
+			if (evento.key.keysym.sym == KEY_JUMP) {
 				if ((jean->pulsa[0] == 0) && (jean->salto == 0) && (jean->agachado == 0))
 					jean->salto = 1;
 			}
@@ -1250,18 +1247,14 @@ void tecladoj (struct protagonista *jean, int *tecla) {
 			}
 			if (evento.key.keysym.sym == SDLK_f)
 				*tecla = 6;
-			if (evento.key.keysym.sym == SDLK_c)
+			if (evento.key.keysym.sym == KEY_GRAPHICS)
 				*tecla = 9;
 	   	if (evento.key.keysym.sym == SDLK_ESCAPE)
       		exit(0);
 		}
 
 		if (evento.type == SDL_KEYUP) {
-#ifdef _OPENPANDORA
-			if (evento.key.keysym.sym == SDLK_PAGEDOWN)
-#else
-			if (evento.key.keysym.sym == SDLK_UP)
-#endif
+			if (evento.key.keysym.sym == KEY_JUMP)
 					jean->pulsa[0] = 0;
 			if (evento.key.keysym.sym == SDLK_DOWN) {
 					jean->pulsa[1] = 0;
@@ -1286,7 +1279,7 @@ void teclado (int *tecla, int fase) {
 		if (evento.type == SDL_QUIT)
 	   	exit(0);
    	if (evento.type == SDL_KEYDOWN) {
-	   	if (evento.key.keysym.sym == SDLK_i) {
+	   	if (evento.key.keysym.sym == KEY_INFO) {
       		if (fase == 1)
 						*tecla = 7;
 			}
@@ -1294,13 +1287,9 @@ void teclado (int *tecla, int fase) {
       		exit(0);
 			if (evento.key.keysym.sym == SDLK_f)
 				*tecla = 6;
-			if (evento.key.keysym.sym == SDLK_c)
+			if (evento.key.keysym.sym == KEY_GRAPHICS)
 				*tecla = 9;
-#ifdef _OPENPANDORA
-			if (evento.key.keysym.sym == SDLK_PAGEDOWN)
-#else
-			if (evento.key.keysym.sym == SDLK_SPACE)
-#endif
+			if (evento.key.keysym.sym == KEY_START)
 				*tecla = 5;
 		}
 	}
@@ -1313,11 +1302,7 @@ void tecladop (int *teclap) {
 
 	while (SDL_PollEvent(&evento)) {
 		if (evento.type == SDL_KEYDOWN) {
-#ifdef _OPENPANDORA
-			if ((evento.key.keysym.sym == SDLK_PAGEDOWN) ||
-#else
-			if ((evento.key.keysym.sym == SDLK_SPACE) ||
-#endif
+			if ((evento.key.keysym.sym == KEY_START) ||
 					(evento.key.keysym.sym == SDLK_LEFT) || (evento.key.keysym.sym == SDLK_RIGHT))
 				*teclap = 1;
 		}