diff --git a/source/director.cpp b/source/director.cpp
index 556fa48..d0d4f98 100644
--- a/source/director.cpp
+++ b/source/director.cpp
@@ -154,6 +154,7 @@ void Director::initInput()
 	input->bindKey(input_start, SDL_SCANCODE_RETURN);
 
 	// Teclado - Control del programa
+	input->bindKey(input_service, SDL_SCANCODE_0);
 	input->bindKey(input_exit, SDL_SCANCODE_ESCAPE);
 	input->bindKey(input_pause, SDL_SCANCODE_P);
 	input->bindKey(input_window_dec_size, SDL_SCANCODE_F1);
@@ -380,6 +381,8 @@ bool Director::setFileList()
 	asset->add(prefix + "/data/shaders/crtpi.glsl", t_data);
 
 	// Texturas
+	asset->add(prefix + "/data/gfx/controllers/controllers.png", t_bitmap);
+
 	asset->add(prefix + "/data/gfx/balloon/balloon1.png", t_bitmap);
 	asset->add(prefix + "/data/gfx/balloon/balloon1.ani", t_animation);
 	asset->add(prefix + "/data/gfx/balloon/balloon2.png", t_bitmap);
diff --git a/source/global_inputs.cpp b/source/global_inputs.cpp
index 2030340..04cde0b 100644
--- a/source/global_inputs.cpp
+++ b/source/global_inputs.cpp
@@ -1,12 +1,13 @@
 #include "global_inputs.h"
-#include <string>        // for basic_string, operator+
-#include "input.h"       // for Input, inputs_e, INPUT_DO_NOT_ALLOW_REPEAT
-#include "jail_audio.h"  // for JA_EnableMusic, JA_EnableSound
-#include "lang.h"        // for getText
-#include "options.h"     // for options
-#include "screen.h"      // for Screen
-#include "section.h"     // for options_e, name, name_e, options
-#include "utils.h"       // for op_audio_t, options_t, op_music_t, boolToOnOff
+#include <string>       // for basic_string, operator+
+#include "input.h"      // for Input, inputs_e, INPUT_DO_NOT_ALLOW_REPEAT
+#include "jail_audio.h" // for JA_EnableMusic, JA_EnableSound
+#include "lang.h"       // for getText
+#include "options.h"    // for options
+#include "on_screen_help.h"
+#include "screen.h"  // for Screen
+#include "section.h" // for options_e, name, name_e, options
+#include "utils.h"   // for op_audio_t, options_t, op_music_t, boolToOnOff
 
 // Termina
 void quit(section::options_e code)
@@ -61,6 +62,12 @@ void checkGlobalInputs()
         return;
     }
 
+    else if (Input::get()->checkInput(input_service, INPUT_DO_NOT_ALLOW_REPEAT, INPUT_USE_KEYBOARD))
+    {
+        OnScreenHelp::get()->toggleState();
+        return;
+    }
+
     for (int i = 0; i < Input::get()->getNumControllers(); ++i)
     {
         // Comprueba si se sale con el mando
diff --git a/source/on_screen_help.cpp b/source/on_screen_help.cpp
index 0a2e79c..2798144 100644
--- a/source/on_screen_help.cpp
+++ b/source/on_screen_help.cpp
@@ -1,8 +1,36 @@
 #include "on_screen_help.h"
+#include "screen.h"
+#include "asset.h"
+#include "input.h"
+#include "text.h"
+#include "sprite.h"
+#include "texture.h"
+#include "lang.h"
 
 // [SINGLETON] Hay que definir las variables estáticas, desde el .h sólo la hemos declarado
 OnScreenHelp *OnScreenHelp::onScreenHelp = nullptr;
 
+// Constantes evaluables en tiempo de compilación
+constexpr int ICONSIZE = 16;
+constexpr SDL_Point PADDING = {8, 8};
+constexpr SDL_Point DESP = {ICONSIZE + 4, 5};
+
+constexpr SDL_Rect CONTROLLER_UP = {16, 16, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect CONTROLLER_DOWN = {48, 16, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect CONTROLLER_LEFT = {64, 16, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect LEFT_BUTTON = {48, 144, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect TOP_BUTTON = {0, 144, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect RIGHT_BUTTON = {16, 144, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect START_BUTTON = {128, 320, ICONSIZE, ICONSIZE};
+
+constexpr SDL_Rect CONTROLLER_UP_POS = {PADDING.x, PADDING.y + 18 * 0, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect CONTROLLER_DOWN_POS = {PADDING.x, PADDING.y + 18 * 1, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect CONTROLLER_LEFT_POS = {PADDING.x, PADDING.y + 18 * 2, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect LEFT_BUTTON_POS = {PADDING.x, PADDING.y + 18 * 3, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect TOP_BUTTON_POS = {PADDING.x, PADDING.y + 18 * 4, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect RIGHT_BUTTON_POS = {PADDING.x, PADDING.y + 18 * 5, ICONSIZE, ICONSIZE};
+constexpr SDL_Rect START_BUTTON_POS = {PADDING.x, PADDING.y + 18 * 6, ICONSIZE, ICONSIZE};
+
 // [SINGLETON] Crearemos el objeto onScreenHelp con esta función estática
 void OnScreenHelp::init()
 {
@@ -22,11 +50,143 @@ OnScreenHelp *OnScreenHelp::get()
 }
 
 // Constructor
-OnScreenHelp::OnScreenHelp()
+OnScreenHelp::OnScreenHelp() : state(OnScreenHelpStatus::showing)
 {
+    setSize();
+
+    texture = SDL_CreateTexture(Screen::get()->getRenderer(), SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, dest.w, dest.h);
+    SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
+
+    fillTexture();
 }
 
 // Destructor
 OnScreenHelp::~OnScreenHelp()
 {
+    SDL_DestroyTexture(texture);
+}
+
+// Actualiza la lógica interna
+void OnScreenHelp::update()
+{
+}
+
+// Muestra el objeto en pantalla
+void OnScreenHelp::render()
+{
+    if (state != OnScreenHelpStatus::hidden)
+    {
+        SDL_RenderCopy(Screen::get()->getRenderer(), texture, nullptr, &dest);
+    }
+}
+
+// Rellena la textura con los gráficos y texto
+void OnScreenHelp::fillTexture()
+{
+    // Cambia el renderizador a la textura
+    SDL_Texture *temp = SDL_GetRenderTarget(Screen::get()->getRenderer());
+    SDL_SetRenderTarget(Screen::get()->getRenderer(), texture);
+
+    // Crea el objeto para el texto
+    Text *text = new Text(Asset::get()->get("8bithud.png"), Asset::get()->get("8bithud.txt"), Screen::get()->getRenderer());
+
+    // Crea la textura con los gráficos
+    Texture *controllersTexture = new Texture(Screen::get()->getRenderer(), Asset::get()->get("controllers.png"));
+
+    // Crea el sprite para dibujar los gráficos
+    Sprite *sprite = new Sprite({0, 0, 16, 16}, controllersTexture);
+
+    // Borra la textura
+    SDL_SetRenderDrawColor(Screen::get()->getRenderer(), 0, 0, 0, 0);
+    SDL_RenderClear(Screen::get()->getRenderer());
+
+    // Pon el color de fondo con el bisel
+    SDL_SetRenderDrawColor(Screen::get()->getRenderer(), 0x55, 0x5D, 0x77, 255);
+    SDL_Rect rect;
+    rect = {4, 0, dest.w - (4 * 2), dest.h};
+    SDL_RenderFillRect(Screen::get()->getRenderer(), &rect);
+
+    rect = {4 / 2, 1, dest.w - 4, dest.h - 2};
+    SDL_RenderFillRect(Screen::get()->getRenderer(), &rect);
+
+    rect = {1, 4 / 2, dest.w - 2, dest.h - 4};
+    SDL_RenderFillRect(Screen::get()->getRenderer(), &rect);
+
+    rect = {0, 4, dest.w, dest.h - (4 * 2)};
+    SDL_RenderFillRect(Screen::get()->getRenderer(), &rect);
+
+    // Dibuja los iconos y el texto
+    sprite->setSpriteClip(CONTROLLER_UP);
+    sprite->setPos(CONTROLLER_UP_POS);
+    sprite->render();
+    text->write(CONTROLLER_UP_POS.x + DESP.x, CONTROLLER_UP_POS.y + DESP.y, lang::getText(107));
+
+    sprite->setSpriteClip(CONTROLLER_DOWN);
+    sprite->setPos(CONTROLLER_DOWN_POS);
+    sprite->render();
+    text->write(CONTROLLER_DOWN_POS.x + DESP.x, CONTROLLER_DOWN_POS.y + DESP.y, lang::getText(108));
+
+    sprite->setSpriteClip(CONTROLLER_LEFT);
+    sprite->setPos(CONTROLLER_LEFT_POS);
+    sprite->render();
+    text->write(CONTROLLER_LEFT_POS.x + DESP.x, CONTROLLER_LEFT_POS.y + DESP.y, lang::getText(109));
+
+    sprite->setSpriteClip(LEFT_BUTTON);
+    sprite->setPos(LEFT_BUTTON_POS);
+    sprite->render();
+    text->write(LEFT_BUTTON_POS.x + DESP.x, LEFT_BUTTON_POS.y + DESP.y, lang::getText(110));
+
+    sprite->setSpriteClip(TOP_BUTTON);
+    sprite->setPos(TOP_BUTTON_POS);
+    sprite->render();
+    text->write(TOP_BUTTON_POS.x + DESP.x, TOP_BUTTON_POS.y + DESP.y, lang::getText(111));
+
+    sprite->setSpriteClip(RIGHT_BUTTON);
+    sprite->setPos(RIGHT_BUTTON_POS);
+    sprite->render();
+    text->write(RIGHT_BUTTON_POS.x + DESP.x, RIGHT_BUTTON_POS.y + DESP.y, lang::getText(112));
+
+    sprite->setSpriteClip(START_BUTTON);
+    sprite->setPos(START_BUTTON_POS);
+    sprite->render();
+    text->write(START_BUTTON_POS.x + DESP.x, START_BUTTON_POS.y + DESP.y, lang::getText(113));
+
+    // text->write(0, 0, "hola");
+
+    // Restaura el destino de renderizado
+    SDL_SetRenderTarget(Screen::get()->getRenderer(), temp);
+
+    // Elimina los objetos
+    delete text;
+    delete controllersTexture;
+    delete sprite;
+}
+
+// Define el ancho y alto de la textura
+void OnScreenHelp::setSize()
+{
+    const int textSize = getLargestStringSize();
+    dest = (SDL_Rect){8, 8, PADDING.x + DESP.x + textSize + PADDING.x, PADDING.y + (7 * 18) + PADDING.y};
+}
+
+// Activa o desactiva el objeto
+void OnScreenHelp::toggleState()
+{
+    state = state == OnScreenHelpStatus::showing ? OnScreenHelpStatus::hidden : OnScreenHelpStatus::showing;
+}
+
+// Calcula la longitud en pixels del texto más largo
+int OnScreenHelp::getLargestStringSize() const
+{
+    Text *text = new Text(Asset::get()->get("8bithud.png"), Asset::get()->get("8bithud.txt"), Screen::get()->getRenderer());
+    int size = 0;
+
+    for (int i = 107; i <= 113; ++i)
+    {
+        const int textSize = text->lenght(lang::getText(i));
+        size = textSize > size ? textSize : size;
+    }
+
+    delete text;
+    return size;
 }
\ No newline at end of file
diff --git a/source/on_screen_help.h b/source/on_screen_help.h
index 8971ebc..a272d2f 100644
--- a/source/on_screen_help.h
+++ b/source/on_screen_help.h
@@ -27,6 +27,9 @@ private:
     Input *input;   // Objeto pata gestionar la entrada
 
     SDL_Texture *texture; // Textura donde dibujar
+    SDL_Rect dest;        // Posición donde dibujar la textura;
+
+    OnScreenHelpStatus state; // Estado del objeto
 
     // [SINGLETON] Ahora el constructor y el destructor son privados, para no poder crear objetos screen desde fuera
 
@@ -36,6 +39,15 @@ private:
     // Destructor
     ~OnScreenHelp();
 
+    // Rellena la textura con los gráficos y texto
+    void fillTexture();
+
+    // Define el ancho y alto de la textura
+    void setSize();
+
+    // Calcula la longitud en pixels del texto más largo
+    int getLargestStringSize() const;
+
 public:
     // [SINGLETON] Crearemos el objeto screen con esta función estática
     static void init();
@@ -45,4 +57,13 @@ public:
 
     // [SINGLETON] Con este método obtenemos el objeto screen y podemos trabajar con él
     static OnScreenHelp *get();
+
+    // Actualiza la lógica interna
+    void update();
+
+    // Muestra el objeto en pantalla
+    void render();
+
+    // Activa o desactiva el objeto
+    void toggleState();
 };
\ No newline at end of file
diff --git a/source/screen.cpp b/source/screen.cpp
index ce8d3f7..5403277 100644
--- a/source/screen.cpp
+++ b/source/screen.cpp
@@ -1,20 +1,21 @@
 #include "screen.h"
-#include <SDL2/SDL_events.h>  // for SDL_DISABLE, SDL_ENABLE
-#include <SDL2/SDL_mouse.h>   // for SDL_ShowCursor
-#include <SDL2/SDL_pixels.h>  // for SDL_PIXELFORMAT_RGBA8888
-#include <SDL2/SDL_timer.h>   // for SDL_GetTicks
-#include <algorithm>          // for max, min
-#include <fstream>            // for basic_ifstream, ifstream
-#include <iterator>           // for istreambuf_iterator, operator!=
-#include <string>             // for basic_string, operator+, to_string, cha...
-#include "asset.h"            // for Asset
-#include "dbgtxt.h"           // for dbg_print
-#include "input.h"            // for Input, inputs_e, INPUT_DO_NOT_ALLOW_REPEAT
-#include "notify.h"           // for Notify
-#include "options.h"          // for options
+#include <SDL2/SDL_events.h> // for SDL_DISABLE, SDL_ENABLE
+#include <SDL2/SDL_mouse.h>  // for SDL_ShowCursor
+#include <SDL2/SDL_pixels.h> // for SDL_PIXELFORMAT_RGBA8888
+#include <SDL2/SDL_timer.h>  // for SDL_GetTicks
+#include <algorithm>         // for max, min
+#include <fstream>           // for basic_ifstream, ifstream
+#include <iterator>          // for istreambuf_iterator, operator!=
+#include <string>            // for basic_string, operator+, to_string, cha...
+#include "asset.h"           // for Asset
+#include "dbgtxt.h"          // for dbg_print
+#include "input.h"           // for Input, inputs_e, INPUT_DO_NOT_ALLOW_REPEAT
+#include "notify.h"          // for Notify
+#include "options.h"         // for options
+#include "on_screen_help.h"
 
 #ifndef NO_SHADERS
-#include "jail_shader.h"      // for init, render
+#include "jail_shader.h" // for init, render
 #endif
 
 // [SINGLETON] Hay que definir las variables estáticas, desde el .h sólo la hemos declarado
@@ -39,11 +40,9 @@ Screen *Screen::get()
 }
 
 // Constructor
-Screen::Screen(SDL_Window *window, SDL_Renderer *renderer)
+Screen::Screen(SDL_Window *window, SDL_Renderer *renderer) : window(window), renderer(renderer)
 {
     // Copia punteros
-    this->window = window;
-    this->renderer = renderer;
     input = Input::get();
     asset = Asset::get();
 
@@ -68,7 +67,7 @@ Screen::Screen(SDL_Window *window, SDL_Renderer *renderer)
     fpsCounter = 0;
     fps = 0;
 #ifdef DEBUG
-    showInfo = true;
+    showInfo = false;
 #else
     showInfo = false;
 #endif
@@ -115,14 +114,17 @@ void Screen::start()
 // Vuelca el contenido del renderizador en pantalla
 void Screen::blit()
 {
+    // Actualiza el contador de FPS
+    fpsCounter++;
+
     // Actualiza y dibuja el efecto de flash en la pantalla
     doFlash();
 
     // Atenua la pantalla
     doAttenuate();
 
-    // Actualiza el contador de FPS
-    fpsCounter++;
+    // Muestra la ayuda por pantalla
+    OnScreenHelp::get()->render();
 
     // Muestra información por pantalla
     displayInfo();