diff --git a/src/menu.cc b/src/menu.cc
index 5a7fc74..180e3c9 100644
--- a/src/menu.cc
+++ b/src/menu.cc
@@ -30,6 +30,14 @@
 #include "utils.h"
 #include "int.h"
 
+#ifdef __EMSCRIPTEN__
+// fredygames.com: no "options" item (the game only says to run the ceferinosetup program, which the
+// browser does not have); the items after it move up one place
+#define NUM_ITEMS 5
+#else
+#define NUM_ITEMS 6
+#endif
+
 menu :: menu(void)
 {
 	lim_todos = 0;
@@ -42,7 +50,7 @@ menu :: ~menu(void)
 {
 	int i;
 
-	for (i = 0; i < 6; i ++)
+	for (i = 0; i < NUM_ITEMS; i ++)
 		delete item_menu [i];
 	
 	for (i = 0; i < 3; i ++)
@@ -75,7 +83,7 @@ int menu :: iniciar(class mundo *_pmundo, int _modo_video, SDL_Surface *_screen)
 		return 1;
 	}
 	
-	for (int i = 0; i < 6; i ++)
+	for (int i = 0; i < NUM_ITEMS; i ++)
 		item_menu [i] = new class item_menu;
 
 	for (int i = 0; i < 3; i ++)
@@ -84,10 +92,16 @@ int menu :: iniciar(class mundo *_pmundo, int _modo_video, SDL_Surface *_screen)
 
 	item_menu [0]->iniciar (fuente, 0, _("new game"));
 	item_menu [1]->iniciar (fuente, 1, _("how to play"));
+#ifdef __EMSCRIPTEN__
+	item_menu [2]->iniciar (fuente, 2, _("credits"));
+	item_menu [3]->iniciar (fuente, 3, _("high scores"));
+	item_menu [4]->iniciar (fuente, 4, _("exit"));
+#else
 	item_menu [2]->iniciar (fuente, 2, _("options"));
 	item_menu [3]->iniciar (fuente, 3, _("credits"));
 	item_menu [4]->iniciar (fuente, 4, _("high scores"));
 	item_menu [5]->iniciar (fuente, 5, _("exit"));
+#endif
 
 	simple_sprite [0]->iniciar(pmundo->libgrafico.ima_tit_1, -594, 616, \
 			90, 8);
@@ -119,7 +133,7 @@ void menu :: actualizar(void)
 
 	if (termino_titulo ()) // terminó la animación del titulo
 	{
-		for (int i = 0; i < 6; i ++)
+		for (int i = 0; i < NUM_ITEMS; i ++)
 			item_menu [i]->actualizar ();
 
 		tecla = SDL_GetKeyState(NULL);
@@ -129,7 +143,7 @@ void menu :: actualizar(void)
 		{
 			item_menu [opcion]->no_seleccionar ();
 			
-			if (opcion == 5)
+			if (opcion == NUM_ITEMS - 1)
 				opcion = 0;
 			else
 				opcion ++;
@@ -147,7 +161,7 @@ void menu :: actualizar(void)
 			item_menu[opcion]->no_seleccionar();
 
 			if (opcion == 0)
-				opcion = 5;
+				opcion = NUM_ITEMS - 1;
 			else
 				opcion --;
 			
@@ -160,7 +174,11 @@ void menu :: actualizar(void)
 		// selecciona una opcion	
 		if (shot())
 		{
+#ifdef __EMSCRIPTEN__
+			switch (opcion >= 2 ? opcion + 1 : opcion)
+#else
 			switch (opcion)
+#endif
 			{
 				case 0:
 					pmundo->cambiar_escena(JUEGO);
@@ -227,7 +245,7 @@ void menu :: imprimir(void)
 			pmundo->reiniciar_reloj();
 		}
 	
-		for (i = 0; i < 6; i++)
+		for (i = 0; i < NUM_ITEMS; i++)
 		{
 			item_menu [i]->imprimir (screen, rect_actual, \
 					& lim_actual);
diff --git a/src/mundo.cc b/src/mundo.cc
index e036000..98f7fb9 100644
--- a/src/mundo.cc
+++ b/src/mundo.cc
@@ -214,6 +214,13 @@ int mundo :: procesar_eventos(SDL_Event *evento)
 				}
 				break;
 
+#ifdef __EMSCRIPTEN__
+			// SDL2 reports the focus as a window event; the game pauses when it loses it
+			case SDL_WINDOWEVENT:
+				if (evento->window.event == SDL_WINDOWEVENT_FOCUS_LOST)
+					actual->pausar();
+				break;
+#else
 			case SDL_ACTIVEEVENT:
 				
 				if (evento->active.state == SDL_APPINPUTFOCUS)
@@ -224,6 +231,7 @@ int mundo :: procesar_eventos(SDL_Event *evento)
 					
 						
 				break;
+#endif
 		}
 	}