diff --git a/source/common/menu.cpp b/source/common/menu.cpp
index d0b96b3..e44cab8 100644
--- a/source/common/menu.cpp
+++ b/source/common/menu.cpp
@@ -458,7 +458,7 @@ void Menu::setSelectorPos(int index)
 	if (index < (int)item.size())
 	{
 		selector.index = index;
-		selector.rect.y = selector.y = selector.originY = selector.targetY = item.at(selector.index).rect.y;
+		selector.rect.y = selector.y = selector.originY = selector.targetY = item[selector.index].rect.y;
 		selector.rect.w = rectBG.rect.w;
 		selector.rect.x = rectBG.rect.x;
 		selector.originH = selector.targetH = selector.rect.h = getSelectorHeight(selector.index);
@@ -486,13 +486,13 @@ void Menu::reset()
 {
 	itemSelected = MENU_NO_OPTION;
 	selector.index = 0;
-	selector.originY = selector.targetY = selector.y = item.at(0).rect.y;
-	selector.originH = selector.targetH = item.at(0).rect.h;
+	selector.originY = selector.targetY = selector.y = item[0].rect.y;
+	selector.originH = selector.targetH = item[0].rect.h;
 	selector.moving = false;
 	selector.resizing = false;
 
 	// Si el primer elemento no es seleccionable, incrementa el selector
-	if (!item.at(selector.index).selectable)
+	if (!item[selector.index].selectable)
 	{
 		increaseSelectorIndex();
 		setSelectorPos(selector.index);
@@ -524,18 +524,18 @@ void Menu::reorganize()
 bool Menu::increaseSelectorIndex()
 {
 	// Obten las coordenadas del elemento actual
-	selector.y = selector.originY = item.at(selector.index).rect.y;
+	selector.y = selector.originY = item[selector.index].rect.y;
 	selector.h = selector.originH = getSelectorHeight(selector.index);
 
 	// Calcula cual es el siguiente elemento
 	++selector.index %= item.size();
-	while (!item.at(selector.index).selectable)
+	while (!item[selector.index].selectable)
 	{
 		++selector.index %= item.size();
 	}
 
 	// Establece las coordenadas y altura de destino
-	selector.targetY = item.at(selector.index).rect.y;
+	selector.targetY = item[selector.index].rect.y;
 	selector.despY = (selector.targetY - selector.originY) / selector.numJumps;
 
 	selector.targetH = getSelectorHeight(selector.index);
@@ -554,7 +554,7 @@ bool Menu::increaseSelectorIndex()
 bool Menu::decreaseSelectorIndex()
 {
 	// Obten las coordenadas del elemento actual
-	selector.y = selector.originY = item.at(selector.index).rect.y;
+	selector.y = selector.originY = item[selector.index].rect.y;
 	selector.h = selector.originH = getSelectorHeight(selector.index);
 
 	// Calcula cual es el siguiente elemento
@@ -567,7 +567,7 @@ bool Menu::decreaseSelectorIndex()
 		selector.index--;
 	}
 
-	while (!item.at(selector.index).selectable)
+	while (!item[selector.index].selectable)
 	{
 		if (selector.index == 0)
 		{
@@ -580,7 +580,7 @@ bool Menu::decreaseSelectorIndex()
 	}
 
 	// Establece las coordenadas y altura de destino
-	selector.targetY = item.at(selector.index).rect.y;
+	selector.targetY = item[selector.index].rect.y;
 	selector.despY = (selector.targetY - selector.originY) / selector.numJumps;
 
 	selector.targetH = getSelectorHeight(selector.index);
@@ -630,29 +630,29 @@ void Menu::render()
 		if (i == selector.index)
 		{
 			const color_t color = {selector.itemColor.r, selector.itemColor.g, selector.itemColor.b};
-			text->writeColored(item.at(i).rect.x, item.at(i).rect.y, item.at(i).label, color);
+			text->writeColored(item[i].rect.x, item[i].rect.y, item[i].label, color);
 		}
 
-		else if (item.at(i).selectable)
+		else if (item[i].selectable)
 		{
-			text->write(item.at(i).rect.x, item.at(i).rect.y, item.at(i).label);
+			text->write(item[i].rect.x, item[i].rect.y, item[i].label);
 		}
 
-		else if (item.at(i).greyed)
+		else if (item[i].greyed)
 		{
-			text->writeColored(item.at(i).rect.x, item.at(i).rect.y, item.at(i).label, colorGreyed);
+			text->writeColored(item[i].rect.x, item[i].rect.y, item[i].label, colorGreyed);
 		}
 
 		else
 		{ // No seleccionable
-			if ((item.at(i).linkedUp) && (i == selector.index + 1))
+			if ((item[i].linkedUp) && (i == selector.index + 1))
 			{
 				const color_t color = {selector.itemColor.r, selector.itemColor.g, selector.itemColor.b};
-				text->writeColored(item.at(i).rect.x, item.at(i).rect.y, item.at(i).label, color);
+				text->writeColored(item[i].rect.x, item[i].rect.y, item[i].label, color);
 			}
 			else // No enlazado con el de arriba
 			{
-				text->write(item.at(i).rect.x, item.at(i).rect.y, item.at(i).label);
+				text->write(item[i].rect.x, item[i].rect.y, item[i].label);
 			}
 		}
 	}
@@ -822,7 +822,7 @@ void Menu::addItem(std::string text, int hPaddingDown, bool selectable, bool gre
 
 	if (item.size() > 1)
 	{
-		if (item.at(item.size() - 2).linkedDown)
+		if (item[item.size() - 2].linkedDown)
 		{
 			item.back().linkedUp = true;
 		}
@@ -835,9 +835,9 @@ void Menu::addItem(std::string text, int hPaddingDown, bool selectable, bool gre
 // Cambia el texto de un item
 void Menu::setItemCaption(int index, std::string text)
 {
-	item.at(index).label = text;
-	item.at(index).rect.w = this->text->lenght(item.at(index).label);
-	item.at(index).rect.h = this->text->getCharacterSize();
+	item[index].label = text;
+	item[index].rect.w = this->text->lenght(item[index].label);
+	item[index].rect.h = this->text->getCharacterSize();
 	reorganize();
 }
 
@@ -914,42 +914,42 @@ int Menu::findHeight()
 // Recoloca los elementos del menu en el eje Y
 void Menu::replaceElementsOnY()
 {
-	item.at(0).rect.y = y;
+	item[0].rect.y = y;
 
 	for (int i = 1; i < (int)item.size(); i++)
 	{
-		item.at(i).rect.y = item.at(i - 1).rect.y + item.at(i - 1).rect.h + item.at(i - 1).hPaddingDown;
+		item[i].rect.y = item[i - 1].rect.y + item[i - 1].rect.h + item[i - 1].hPaddingDown;
 	}
 }
 
 // Establece el estado seleccionable de un item
 void Menu::setSelectable(int index, bool value)
 {
-	item.at(index).selectable = value;
+	item[index].selectable = value;
 }
 
 // Establece el estado agrisado de un item
 void Menu::setGreyed(int index, bool value)
 {
-	item.at(index).greyed = value;
+	item[index].greyed = value;
 }
 
 // Establece el estado de enlace de un item
 void Menu::setLinkedDown(int index, bool value)
 {
-	item.at(index).linkedDown = value;
+	item[index].linkedDown = value;
 }
 
 // Calcula la altura del selector
 int Menu::getSelectorHeight(int value)
 {
-	if (item.at(value).linkedDown)
+	if (item[value].linkedDown)
 	{
-		return item.at(value).rect.h + item.at(value).hPaddingDown + item.at(value + 1).rect.h;
+		return item[value].rect.h + item[value].hPaddingDown + item[value + 1].rect.h;
 	}
 	else
 	{
-		return item.at(value).rect.h;
+		return item[value].rect.h;
 	}
 }
 
diff --git a/source/demo.cpp b/source/demo.cpp
index a46aafd..ac3a820 100644
--- a/source/demo.cpp
+++ b/source/demo.cpp
@@ -15,7 +15,7 @@ Demo::Demo(SDL_Renderer *renderer, Screen *screen, Resource *resource, Asset *as
 	rooms.push_back("44.room");
 
 	roomIndex = 0;
-	currentRoom = rooms.at(roomIndex);
+	currentRoom = rooms[roomIndex];
 
 	// Copia los punteros
 	this->resource = resource;
@@ -260,7 +260,7 @@ void Demo::checkRoomChange()
 		}
 		else
 		{
-			changeRoom(rooms.at(roomIndex));
+			changeRoom(rooms[roomIndex]);
 		}
 	}
 }
diff --git a/source/ending.cpp b/source/ending.cpp
index da0fc65..656ba35 100644
--- a/source/ending.cpp
+++ b/source/ending.cpp
@@ -119,16 +119,16 @@ void Ending::render()
     screen->clean(stringToColor(options->palette, "black"));
 
     // Dibuja las imagenes de la escena
-    spritePics.at(scene).sprite->render();
-    spritePics.at(scene).coverSprite->render();
+    spritePics[scene].sprite->render();
+    spritePics[scene].coverSprite->render();
 
     // Dibuja los textos de la escena
-    for (auto ti : scenes.at(scene).textIndex)
+    for (auto ti : scenes[scene].textIndex)
     {
         if (counter > ti.trigger)
         {
-            spriteTexts.at(ti.index).sprite->render();
-            spriteTexts.at(ti.index).coverSprite->render();
+            spriteTexts[ti.index].sprite->render();
+            spriteTexts[ti.index].coverSprite->render();
         }
     }
 
@@ -511,7 +511,7 @@ void Ending::updateCounters()
         counter++;
     }
 
-    if (counter > scenes.at(scene).counterEnd - 100)
+    if (counter > scenes[scene].counterEnd - 100)
     {
         coverCounter++;
     }
@@ -522,20 +522,20 @@ void Ending::updateSpriteCovers()
 { // Actualiza la cortinilla de los textos
     if (counter % 4 == 0)
     {
-        for (auto ti : scenes.at(scene).textIndex)
+        for (auto ti : scenes[scene].textIndex)
         {
             if (counter > ti.trigger)
             {
-                if (spriteTexts.at(ti.index).clipDesp > 0)
+                if (spriteTexts[ti.index].clipDesp > 0)
                 {
-                    spriteTexts.at(ti.index).clipDesp -= 2;
+                    spriteTexts[ti.index].clipDesp -= 2;
                 }
-                else if (spriteTexts.at(ti.index).clipHeight > 0)
+                else if (spriteTexts[ti.index].clipHeight > 0)
                 {
-                    spriteTexts.at(ti.index).clipHeight -= 2;
-                    spriteTexts.at(ti.index).coverSprite->setPosY(spriteTexts.at(ti.index).coverSprite->getPosY() + 2);
+                    spriteTexts[ti.index].clipHeight -= 2;
+                    spriteTexts[ti.index].coverSprite->setPosY(spriteTexts[ti.index].coverSprite->getPosY() + 2);
                 }
-                spriteTexts.at(ti.index).coverSprite->setSpriteClip(0, spriteTexts.at(ti.index).clipDesp, spriteTexts.at(ti.index).coverSprite->getWidth(), spriteTexts.at(ti.index).clipHeight);
+                spriteTexts[ti.index].coverSprite->setSpriteClip(0, spriteTexts[ti.index].clipDesp, spriteTexts[ti.index].coverSprite->getWidth(), spriteTexts[ti.index].clipHeight);
             }
         }
     }
@@ -543,27 +543,27 @@ void Ending::updateSpriteCovers()
     // Actualiza la cortinilla de las imagenes
     if (counter % 2 == 0)
     {
-        if (spritePics.at(scene).clipDesp > 0)
+        if (spritePics[scene].clipDesp > 0)
         {
-            spritePics.at(scene).clipDesp -= 2;
+            spritePics[scene].clipDesp -= 2;
         }
-        else if (spritePics.at(scene).clipHeight > 0)
+        else if (spritePics[scene].clipHeight > 0)
         {
-            spritePics.at(scene).clipHeight -= 2;
-            if (spritePics.at(scene).clipHeight < 0)
+            spritePics[scene].clipHeight -= 2;
+            if (spritePics[scene].clipHeight < 0)
             {
-                spritePics.at(scene).clipHeight = 0;
+                spritePics[scene].clipHeight = 0;
             }
-            spritePics.at(scene).coverSprite->setPosY(spritePics.at(scene).coverSprite->getPosY() + 2);
+            spritePics[scene].coverSprite->setPosY(spritePics[scene].coverSprite->getPosY() + 2);
         }
-        spritePics.at(scene).coverSprite->setSpriteClip(0, spritePics.at(scene).clipDesp, spritePics.at(scene).coverSprite->getWidth(), spritePics.at(scene).clipHeight);
+        spritePics[scene].coverSprite->setSpriteClip(0, spritePics[scene].clipDesp, spritePics[scene].coverSprite->getWidth(), spritePics[scene].clipHeight);
     }
 }
 
 // Comprueba si se ha de cambiar de escena
 void Ending::checkChangeScene()
 {
-    if (counter > scenes.at(scene).counterEnd)
+    if (counter > scenes[scene].counterEnd)
     {
         scene++;
         counter = 0;
@@ -639,20 +639,20 @@ void Ending::switchPalette()
     {
         options->palette = p_zxarne;
 
-        spritePics.at(0).sprite->setTexture(resource->getTexture("ending1_zxarne.png"));
-        spritePics.at(1).sprite->setTexture(resource->getTexture("ending2_zxarne.png"));
-        spritePics.at(2).sprite->setTexture(resource->getTexture("ending3_zxarne.png"));
-        spritePics.at(3).sprite->setTexture(resource->getTexture("ending4_zxarne.png"));
-        spritePics.at(4).sprite->setTexture(resource->getTexture("ending5_zxarne.png"));
+        spritePics[0].sprite->setTexture(resource->getTexture("ending1_zxarne.png"));
+        spritePics[1].sprite->setTexture(resource->getTexture("ending2_zxarne.png"));
+        spritePics[2].sprite->setTexture(resource->getTexture("ending3_zxarne.png"));
+        spritePics[3].sprite->setTexture(resource->getTexture("ending4_zxarne.png"));
+        spritePics[4].sprite->setTexture(resource->getTexture("ending5_zxarne.png"));
     }
     else
     {
         options->palette = p_zxspectrum;
 
-        spritePics.at(0).sprite->setTexture(resource->getTexture("ending1.png"));
-        spritePics.at(1).sprite->setTexture(resource->getTexture("ending2.png"));
-        spritePics.at(2).sprite->setTexture(resource->getTexture("ending3.png"));
-        spritePics.at(3).sprite->setTexture(resource->getTexture("ending4.png"));
-        spritePics.at(4).sprite->setTexture(resource->getTexture("ending5.png"));
+        spritePics[0].sprite->setTexture(resource->getTexture("ending1.png"));
+        spritePics[1].sprite->setTexture(resource->getTexture("ending2.png"));
+        spritePics[2].sprite->setTexture(resource->getTexture("ending3.png"));
+        spritePics[3].sprite->setTexture(resource->getTexture("ending4.png"));
+        spritePics[4].sprite->setTexture(resource->getTexture("ending5.png"));
     }
 }
\ No newline at end of file
diff --git a/source/ending2.cpp b/source/ending2.cpp
index 6712593..bd5b2c0 100644
--- a/source/ending2.cpp
+++ b/source/ending2.cpp
@@ -469,13 +469,13 @@ void Ending2::placeSprites()
     {
         const int x = i % 2 == 0 ? firstCol : secondCol;
         const int y = (i / 1) * (maxSpriteHeight + distSpriteText + text->getCharacterSize() + distSpriteSprite) + GAMECANVAS_HEIGHT + 40;
-        const int w = sprites.at(i)->getAnimationClip(0, 0).w;
-        const int h = sprites.at(i)->getAnimationClip(0, 0).h;
+        const int w = sprites[i]->getAnimationClip(0, 0).w;
+        const int h = sprites[i]->getAnimationClip(0, 0).h;
         const int dx = -(w / 2);
         const int dy = i % 1 == 0 ? maxSpriteHeight - h : (int)(maxSpriteHeight * 1.5f) - h;
 
-        sprites.at(i)->setRect({x + dx, y + dy, w, h});
-        sprites.at(i)->setVelY(despSpeed);
+        sprites[i]->setRect({x + dx, y + dy, w, h});
+        sprites[i]->setVelY(despSpeed);
     }
 
     // Recoloca el último sprite, que es el del jugador
@@ -497,14 +497,14 @@ void Ending2::createSpriteTexts()
     for (int i = 0; i < (int)spriteList.size(); ++i)
     {
         // Calcula constantes
-        std::string txt = spriteList.at(i);
+        std::string txt = spriteList[i];
         std::replace(txt.begin(), txt.end(), '_', ' ');
         txt = txt == "player" ? "JAILDOCTOR" : txt; // Reemplaza el texto
         const int w = text->lenght(txt, 1);
         const int h = text->getCharacterSize();
         const int x = i % 2 == 0 ? firstCol : secondCol;
         const int dx = -(w / 2);
-        const int y = sprites.at(i)->getPosY() + sprites.at(i)->getHeight() + distSpriteText;
+        const int y = sprites[i]->getPosY() + sprites[i]->getHeight() + distSpriteText;
 
         // Cambia la posición del último sprite
         const int X = (i == (int)spriteList.size() - 1) ? GAMECANVAS_CENTER_X - (w / 2) : x + dx;
@@ -536,7 +536,7 @@ void Ending2::createTexts()
     for (int i = 0; i < (int)list.size(); ++i)
     {
         // Calcula constantes
-        const int w = text->lenght(list.at(i), 1);
+        const int w = text->lenght(list[i], 1);
         const int h = text->getCharacterSize();
         const int x = GAMECANVAS_CENTER_X;
         const int dx = -(w / 2);
@@ -547,7 +547,7 @@ void Ending2::createTexts()
         texture->createBlank(renderer, w, h, SDL_TEXTUREACCESS_TARGET);
         texture->setAsRenderTarget(renderer);
         texture->setBlendMode(SDL_BLENDMODE_BLEND);
-        text->write(0, 0, list.at(i));
+        text->write(0, 0, list[i]);
 
         // Crea el sprite
         MovingSprite *sprite = new MovingSprite(x + dx, y, w, h, 0.0f, despSpeed, 0.0f, 0.0f, texture, renderer);
@@ -565,7 +565,7 @@ void Ending2::createTexts()
     for (int i = 0; i < (int)list.size(); ++i)
     {
         // Calcula constantes
-        const int w = text->lenght(list.at(i), 1);
+        const int w = text->lenght(list[i], 1);
         const int h = text->getCharacterSize();
         const int x = GAMECANVAS_CENTER_X;
         const int dx = -(w / 2);
@@ -576,7 +576,7 @@ void Ending2::createTexts()
         texture->createBlank(renderer, w, h, SDL_TEXTUREACCESS_TARGET);
         texture->setAsRenderTarget(renderer);
         texture->setBlendMode(SDL_BLENDMODE_BLEND);
-        text->write(0, 0, list.at(i));
+        text->write(0, 0, list[i]);
 
         // Crea el sprite
         MovingSprite *sprite = new MovingSprite(x + dx, y, w, h, 0.0f, despSpeed, 0.0f, 0.0f, texture, renderer);
@@ -624,7 +624,7 @@ void Ending2::updateFinalFade()
 
     for (auto t : texts)
     {
-        t->getTexture()->setColor(colors.at(index).r, colors.at(index).g, colors.at(index).b);
+        t->getTexture()->setColor(colors[index].r, colors[index].g, colors[index].b);
     }
 }
 
diff --git a/source/game_over.cpp b/source/game_over.cpp
index 9c5b2f2..4128f77 100644
--- a/source/game_over.cpp
+++ b/source/game_over.cpp
@@ -198,13 +198,13 @@ void GameOver::updateColor()
         // const float step = std::min(std::max(counter, iniFade) - iniFade, fadeLenght) / (float)fadeLenght;
         const float step = std::min(counter, fadeLenght) / (float)fadeLenght;
         const int index = (colors.size() - 1) - int((colors.size() - 1) * step);
-        color = colors.at(index);
+        color = colors[index];
     }
     else
     {
         const float step = std::min(std::max(counter, iniFade) - iniFade, fadeLenght) / (float)fadeLenght;
         const int index = (colors.size() - 1) * step;
-        color = colors.at(index);
+        color = colors[index];
     }
 }
 
diff --git a/source/stats.cpp b/source/stats.cpp
index ab4695f..85e39e7 100644
--- a/source/stats.cpp
+++ b/source/stats.cpp
@@ -60,7 +60,7 @@ void Stats::addDeath(std::string name)
     const int index = findByName(name, bufferList);
     if (index != -1)
     {
-        bufferList.at(index).died++;
+        bufferList[index].died++;
     }
 
     // En caso contrario crea la entrada
@@ -84,7 +84,7 @@ void Stats::addVisit(std::string name)
     const int index = findByName(name, bufferList);
     if (index != -1)
     {
-        bufferList.at(index).visited++;
+        bufferList[index].visited++;
     }
 
     // En caso contrario crea la entrada
@@ -304,8 +304,8 @@ void Stats::updateListFromBuffer()
 
         if (index != -1)
         { // Encontrado. Aumenta sus estadisticas
-            list.at(index).visited += buffer.visited;
-            list.at(index).died += buffer.died;
+            list[index].visited += buffer.visited;
+            list[index].died += buffer.died;
         }
         else
         { // En caso contrario crea la entrada