diff --git a/Makefile b/Makefile
index bd53dd08..36ae99d7 100644
--- a/Makefile
+++ b/Makefile
@@ -10,14 +10,17 @@ macosIntelRelease = $(executable)-$(version)-macos-intel.dmg
 macosAppleSiliconRelease = $(executable)-$(version)-macos-apple-silicon.dmg
 linuxRelease = $(executable)-$(version)-linux.tar.gz
 
+# Specify the C++ standard
+cpp_standard = c++20
+
 windows:
 	@echo off
-	g++ $(source) -std=c++11 -Wall -Os -lmingw32 -lws2_32 -lSDL2main -lSDL2 -lopengl32 -ffunction-sections -fdata-sections -Wl,--gc-sections -static-libstdc++ -Wl,-subsystem,windows -o "$(executable).exe"
+	g++ $(source) -std=$(cpp_standard) -Wall -Os -lmingw32 -lws2_32 -lSDL2main -lSDL2 -lopengl32 -ffunction-sections -fdata-sections -Wl,--gc-sections -static-libstdc++ -Wl,-subsystem,windows -o "$(executable).exe"
 	strip -s -R .comment -R .gnu.version "$(executable).exe" --strip-unneeded
 
 windows_debug:
 	@echo off
-	g++ $(source) -D DEBUG -std=c++11 -Wall -Os -lmingw32 -lws2_32 -lSDL2main -lSDL2 -lopengl32 -ffunction-sections -fdata-sections -Wl,--gc-sections -static-libstdc++ -Wl,-subsystem,windows -o "$(executable)_debug.exe"
+	g++ $(source) -D DEBUG -std=$(cpp_standard) -Wall -Os -lmingw32 -lws2_32 -lSDL2main -lSDL2 -lopengl32 -ffunction-sections -fdata-sections -Wl,--gc-sections -static-libstdc++ -Wl,-subsystem,windows -o "$(executable)_debug.exe"
 	strip -s -R .comment -R .gnu.version "$(executable)_debug.exe" --strip-unneeded
 
 windows_release:
@@ -38,7 +41,7 @@ windows_release:
 	powershell Copy-Item "release\*.dll" -Destination "$(releaseFolder)"
 
 # Build
-	g++ $(source) -std=c++11 -Wall -Os -lmingw32 -lws2_32 -lSDL2main -lSDL2 -lopengl32 -ffunction-sections -fdata-sections -Wl,--gc-sections -static-libstdc++ -Wl,-subsystem,windows -o "$(releaseFolder)/$(executable).exe"
+	g++ $(source) -std=$(cpp_standard) -Wall -Os -lmingw32 -lws2_32 -lSDL2main -lSDL2 -lopengl32 -ffunction-sections -fdata-sections -Wl,--gc-sections -static-libstdc++ -Wl,-subsystem,windows -o "$(releaseFolder)/$(executable).exe"
 	strip -s -R .comment -R .gnu.version "$(releaseFolder)/$(executable).exe" --strip-unneeded
 
 # Create ZIP
@@ -49,10 +52,10 @@ windows_release:
 	powershell if (Test-Path "$(releaseFolder)") {Remove-Item "$(releaseFolder)" -Recurse -Force}
 
 macos:
-	clang++ $(source) -std=c++11 -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -o "$(executable)"
+	clang++ $(source) -std=$(cpp_standard) -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -o "$(executable)"
 
 macos_debug:
-	clang++ $(source) -D DEBUG -std=c++11 -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -o "$(executable)_debug"
+	clang++ $(source) -D DEBUG -std=$(cpp_standard) -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -o "$(executable)_debug"
 
 macos_release:
 # Remove data and possible data from previous builds
@@ -87,7 +90,7 @@ macos_release:
 	ln -s /Applications "$(releaseFolder)"/Applications
 
 # Build INTEL
-	clang++ $(source) -D MACOS_BUNDLE -std=c++11 -Wall -Os -framework SDL2 -F ./Frameworks -ffunction-sections -fdata-sections -o "$(releaseFolder)/$(appName).app/Contents/MacOS/$(executable)" -rpath @executable_path/../Frameworks/ -target x86_64-apple-macos10.12
+	clang++ $(source) -D MACOS_BUNDLE -std=$(cpp_standard) -Wall -Os -framework SDL2 -F ./Frameworks -ffunction-sections -fdata-sections -o "$(releaseFolder)/$(appName).app/Contents/MacOS/$(executable)" -rpath @executable_path/../Frameworks/ -target x86_64-apple-macos10.12
 
 # Build INTEL DMG
 	hdiutil create tmp.dmg -ov -volname "$(appName)" -fs HFS+ -srcfolder "$(releaseFolder)" 
@@ -95,7 +98,7 @@ macos_release:
 	rm -f tmp.dmg
 
 # Build APPLE SILICON	
-	clang++ $(source) -D MACOS_BUNDLE -std=c++11 -Wall -Os -framework SDL2 -F ./Frameworks -ffunction-sections -fdata-sections -o "$(releaseFolder)/$(appName).app/Contents/MacOS/$(executable)" -rpath @executable_path/../Frameworks/ -target arm64-apple-macos11
+	clang++ $(source) -D MACOS_BUNDLE -std=$(cpp_standard) -Wall -Os -framework SDL2 -F ./Frameworks -ffunction-sections -fdata-sections -o "$(releaseFolder)/$(appName).app/Contents/MacOS/$(executable)" -rpath @executable_path/../Frameworks/ -target arm64-apple-macos11
 
 # Build APPLE SILICON DMG
 	hdiutil create tmp.dmg -ov -volname "$(appName)" -fs HFS+ -srcfolder "$(releaseFolder)" 
@@ -107,11 +110,11 @@ macos_release:
 	rm -rdf "$(releaseFolder)"
 
 linux:
-	g++ $(source) -std=c++11 -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -Wl,--gc-sections -o "$(executable)"
+	g++ $(source) -std=$(cpp_standard) -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -Wl,--gc-sections -o "$(executable)"
 	strip -s -R .comment -R .gnu.version "$(executable)" --strip-unneeded
 
 linux_debug:
-	g++ $(source) -D DEBUG -std=c++11 -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -Wl,--gc-sections -o "$(executable)_debug"
+	g++ $(source) -D DEBUG -std=$(cpp_standard) -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -Wl,--gc-sections -o "$(executable)_debug"
 	strip -s -R .comment -R .gnu.version "$(executable)_debug" --strip-unneeded
 
 linux_release:
@@ -131,7 +134,7 @@ linux_release:
 	rm -f "$(releaseFolder)/data/room/standard.tsx"
 
 # Build
-	g++ $(source) -std=c++11 -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -Wl,--gc-sections -o "$(releaseFolder)/$(executable)"
+	g++ $(source) -std=$(cpp_standard) -Wall -Os -lSDL2 -ffunction-sections -fdata-sections -Wl,--gc-sections -o "$(releaseFolder)/$(executable)"
 	strip -s -R .comment -R .gnu.version "$(releaseFolder)/$(executable)" --strip-unneeded
 
 # Pack files
diff --git a/source/const.h b/source/const.h
index 186226c4..0f4e1c11 100644
--- a/source/const.h
+++ b/source/const.h
@@ -4,69 +4,64 @@
 #include <string>
 #include "utils.h"
 
-#ifndef CONST_H
-#define CONST_H
-
 // Textos
-#define WINDOW_CAPTION "JailDoctor's Dilemma"
-#define TEXT_COPYRIGHT "@2022 JailDesigner"
-#define VERSION "0.7"
+constexpr const char* WINDOW_CAPTION = "JailDoctor's Dilemma";
+constexpr const char* TEXT_COPYRIGHT = "@2022 JailDesigner";
+constexpr const char* VERSION = "0.7";
 
 // Tamaño de bloque
-#define BLOCK 8
-#define HALF_BLOCK 4
+constexpr int BLOCK = 8;
+constexpr int HALF_BLOCK = 4;
 
 // Tamaño de la pantalla virtual
-#define GAMECANVAS_WIDTH 256
-#define GAMECANVAS_HEIGHT 192
+constexpr int GAMECANVAS_WIDTH = 256;
+constexpr int GAMECANVAS_HEIGHT = 192;
 
 // Zona de juego
-const int PLAY_AREA_TOP = (0 * BLOCK);
-const int PLAY_AREA_BOTTOM = (16 * BLOCK);
-const int PLAY_AREA_LEFT = (0 * BLOCK);
-const int PLAY_AREA_RIGHT = (32 * BLOCK);
-const int PLAY_AREA_WIDTH = PLAY_AREA_RIGHT - PLAY_AREA_LEFT;
-const int PLAY_AREA_HEIGHT = PLAY_AREA_BOTTOM - PLAY_AREA_TOP;
-const int PLAY_AREA_CENTER_X = PLAY_AREA_LEFT + (PLAY_AREA_WIDTH / 2);
-const int PLAY_AREA_CENTER_FIRST_QUARTER_X = (PLAY_AREA_WIDTH / 4);
-const int PLAY_AREA_CENTER_THIRD_QUARTER_X = (PLAY_AREA_WIDTH / 4) * 3;
-const int PLAY_AREA_CENTER_Y = PLAY_AREA_TOP + (PLAY_AREA_HEIGHT / 2);
-const int PLAY_AREA_FIRST_QUARTER_Y = PLAY_AREA_HEIGHT / 4;
-const int PLAY_AREA_THIRD_QUARTER_Y = (PLAY_AREA_HEIGHT / 4) * 3;
+constexpr int PLAY_AREA_TOP = (0 * BLOCK);
+constexpr int PLAY_AREA_BOTTOM = (16 * BLOCK);
+constexpr int PLAY_AREA_LEFT = (0 * BLOCK);
+constexpr int PLAY_AREA_RIGHT = (32 * BLOCK);
+constexpr int PLAY_AREA_WIDTH = PLAY_AREA_RIGHT - PLAY_AREA_LEFT;
+constexpr int PLAY_AREA_HEIGHT = PLAY_AREA_BOTTOM - PLAY_AREA_TOP;
+constexpr int PLAY_AREA_CENTER_X = PLAY_AREA_LEFT + (PLAY_AREA_WIDTH / 2);
+constexpr int PLAY_AREA_CENTER_FIRST_QUARTER_X = (PLAY_AREA_WIDTH / 4);
+constexpr int PLAY_AREA_CENTER_THIRD_QUARTER_X = (PLAY_AREA_WIDTH / 4) * 3;
+constexpr int PLAY_AREA_CENTER_Y = PLAY_AREA_TOP + (PLAY_AREA_HEIGHT / 2);
+constexpr int PLAY_AREA_FIRST_QUARTER_Y = PLAY_AREA_HEIGHT / 4;
+constexpr int PLAY_AREA_THIRD_QUARTER_Y = (PLAY_AREA_HEIGHT / 4) * 3;
 
-#define BORDER_TOP 0
-#define BORDER_RIGHT 1
-#define BORDER_BOTTOM 2
-#define BORDER_LEFT 3
+constexpr int BORDER_TOP = 0;
+constexpr int BORDER_RIGHT = 1;
+constexpr int BORDER_BOTTOM = 2;
+constexpr int BORDER_LEFT = 3;
 
 // Anclajes de pantalla
-const int GAMECANVAS_CENTER_X = GAMECANVAS_WIDTH / 2;
-const int GAMECANVAS_FIRST_QUARTER_X = GAMECANVAS_WIDTH / 4;
-const int GAMECANVAS_THIRD_QUARTER_X = (GAMECANVAS_WIDTH / 4) * 3;
-const int GAMECANVAS_CENTER_Y = GAMECANVAS_HEIGHT / 2;
-const int GAMECANVAS_FIRST_QUARTER_Y = GAMECANVAS_HEIGHT / 4;
-const int GAMECANVAS_THIRD_QUARTER_Y = (GAMECANVAS_HEIGHT / 4) * 3;
+constexpr int GAMECANVAS_CENTER_X = GAMECANVAS_WIDTH / 2;
+constexpr int GAMECANVAS_FIRST_QUARTER_X = GAMECANVAS_WIDTH / 4;
+constexpr int GAMECANVAS_THIRD_QUARTER_X = (GAMECANVAS_WIDTH / 4) * 3;
+constexpr int GAMECANVAS_CENTER_Y = GAMECANVAS_HEIGHT / 2;
+constexpr int GAMECANVAS_FIRST_QUARTER_Y = GAMECANVAS_HEIGHT / 4;
+constexpr int GAMECANVAS_THIRD_QUARTER_Y = (GAMECANVAS_HEIGHT / 4) * 3;
 
 // Secciones del programa
-#define SECTION_LOGO 0
-#define SECTION_LOADING_SCREEN 1
-#define SECTION_TITLE 2
-#define SECTION_CREDITS 3
-#define SECTION_GAME 4
-#define SECTION_DEMO 5
-#define SECTION_GAME_OVER 6
-#define SECTION_ENDING 7
-#define SECTION_ENDING2 8
-#define SECTION_QUIT 9
+constexpr int SECTION_LOGO = 0;
+constexpr int SECTION_LOADING_SCREEN = 1;
+constexpr int SECTION_TITLE = 2;
+constexpr int SECTION_CREDITS = 3;
+constexpr int SECTION_GAME = 4;
+constexpr int SECTION_DEMO = 5;
+constexpr int SECTION_GAME_OVER = 6;
+constexpr int SECTION_ENDING = 7;
+constexpr int SECTION_ENDING2 = 8;
+constexpr int SECTION_QUIT = 9;
 
 // Subsecciones
-#define SUBSECTION_LOGO_TO_INTRO 0
-#define SUBSECTION_LOGO_TO_TITLE 1
-#define SUBSECTION_TITLE_WITH_LOADING_SCREEN 2
-#define SUBSECTION_TITLE_WITHOUT_LOADING_SCREEN 3
+constexpr int SUBSECTION_LOGO_TO_INTRO = 0;
+constexpr int SUBSECTION_LOGO_TO_TITLE = 1;
+constexpr int SUBSECTION_TITLE_WITH_LOADING_SCREEN = 2;
+constexpr int SUBSECTION_TITLE_WITHOUT_LOADING_SCREEN = 3;
 
 // Colores
 const color_t borderColor = {0x27, 0x27, 0x36};
 const color_t black = {0xFF, 0xFF, 0xFF};
-
-#endif
\ No newline at end of file
diff --git a/source/director.cpp b/source/director.cpp
index 1644379f..ca4ca815 100644
--- a/source/director.cpp
+++ b/source/director.cpp
@@ -41,8 +41,10 @@
 #endif
 
 // Constructor
-Director::Director(int argc, char *argv[])
+Director::Director(int argc, const char *argv[])
 {
+	std::cout << "Game start" << std::endl;
+
 	section = new section_t();
 	section->name = SECTION_LOGO;
 	section->subsection = SUBSECTION_LOGO_TO_INTRO;
@@ -112,6 +114,8 @@ Director::~Director()
 	SDL_DestroyRenderer(renderer);
 	SDL_DestroyWindow(window);
 	SDL_Quit();
+
+	std::cout << "\nBye!" << std::endl;
 }
 
 // Crea e inicializa las opciones del programa
@@ -165,7 +169,7 @@ void Director::initOptions()
 }
 
 // Comprueba los parametros del programa
-void Director::checkProgramArguments(int argc, char *argv[])
+void Director::checkProgramArguments(int argc, const char *argv[])
 {
 	// Establece la ruta del programa
 	executablePath = argv[0];
@@ -360,7 +364,7 @@ bool Director::saveConfig()
 	}
 	else
 	{
-		file << "filter=FILTER_LINEAL\n";
+		file << "filter=FILTER_LINEAR\n";
 	}
 
 	file << "shaders=" + boolToString(options->shaders) + "\n";
@@ -1081,9 +1085,9 @@ bool Director::setOptions(options_t *options, std::string var, std::string value
 
 	else if (var == "filter")
 	{
-		if (value == "FILTER_LINEAL")
+		if (value == "FILTER_LINEAR")
 		{
-			options->filter = FILTER_LINEAL;
+			options->filter = FILTER_LINEAR;
 		}
 		else
 		{
@@ -1843,7 +1847,7 @@ void Director::runGame()
 	resource->free();
 }
 
-void Director::run()
+int Director::run()
 {
 	// Bucle principal
 	while (section->name != SECTION_QUIT)
@@ -1887,4 +1891,6 @@ void Director::run()
 			break;
 		}
 	}
+
+	return 0;
 }
\ No newline at end of file
diff --git a/source/director.h b/source/director.h
index a05d36a6..0d09d838 100644
--- a/source/director.h
+++ b/source/director.h
@@ -53,7 +53,7 @@ private:
 	void initOptions();
 
 	// Comprueba los parametros del programa
-	void checkProgramArguments(int argc, char *argv[]);
+	void checkProgramArguments(int argc, const char *argv[]);
 
 	// Carga el fichero de configuración
 	bool loadConfig();
@@ -111,11 +111,11 @@ private:
 
 public:
 	// Constructor
-	Director(int argc, char *argv[]);
+	Director(int argc, const char *argv[]);
 
 	// Destructor
 	~Director();
 
 	// Bucle principal
-	void run();
+	int run();
 };
\ No newline at end of file
diff --git a/source/input.h b/source/input.h
index 575c150a..dc2f47b1 100644
--- a/source/input.h
+++ b/source/input.h
@@ -6,6 +6,15 @@
 #include <string>					 // Para string, basic_string
 #include <vector>					 // Para vector
 
+// Definiciones de repetición
+constexpr bool REPEAT_TRUE = true;
+constexpr bool REPEAT_FALSE = false;
+
+// Tipos de entrada
+constexpr int INPUT_USE_KEYBOARD = 0;
+constexpr int INPUT_USE_GAMECONTROLLER = 1;
+constexpr int INPUT_USE_ANY = 2;
+
 enum inputs_e
 {
 	// Inputs obligatorios
@@ -33,13 +42,6 @@ enum inputs_e
 	input_number_of_inputs
 };
 
-#define REPEAT_TRUE true
-#define REPEAT_FALSE false
-
-#define INPUT_USE_KEYBOARD 0
-#define INPUT_USE_GAMECONTROLLER 1
-#define INPUT_USE_ANY 2
-
 enum i_disable_e
 {
 	d_notDisabled,
diff --git a/source/jail_shader.h b/source/jail_shader.h
index 5c113add..ba99f0ca 100644
--- a/source/jail_shader.h
+++ b/source/jail_shader.h
@@ -1,5 +1,3 @@
-#ifndef NO_SHADERS
-
 #pragma once
 
 #include <SDL2/SDL_render.h> // para SDL_Texture
@@ -44,5 +42,4 @@ namespace shader
                     const char *vertexShader, const char *fragmentShader = nullptr);
 
     void render();
-}
-#endif
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/source/main.cpp b/source/main.cpp
index 0b067dd2..46ea5578 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -5,26 +5,14 @@ Empezado en Castalla el 01/07/2022.
 
 */
 
+#include <memory>
 #include "director.h"
-#include <iostream>
-
-using namespace std;
 
 int main(int argc, char *argv[])
 {
-	cout << "Starting the game..." << endl;
-
 	// Crea el objeto Director
-	Director *director = new Director(argc, argv);
+    auto director = std::make_unique<Director>(argc, const_cast<const char **>(argv));
 
 	// Bucle principal
-	director->run();
-
-	// Destruye el objeto Director
-	delete director;
-	director = nullptr;
-
-	cout << "\nShutting down the game..." << endl;
-
-	return 0;
+	return director->run();
 }
diff --git a/source/menu.h b/source/menu.h
index 20c27ff8..f4fb308b 100644
--- a/source/menu.h
+++ b/source/menu.h
@@ -11,17 +11,17 @@ class Resource;
 class Text;
 struct JA_Sound_t;
 
-// Tipos de fondos para el menu
-#define MENU_BACKGROUND_TRANSPARENT 0
-#define MENU_BACKGROUND_SOLID 1
+// Tipos de fondos para el menú
+constexpr int MENU_BACKGROUND_TRANSPARENT = 0;
+constexpr int MENU_BACKGROUND_SOLID = 1;
 
 // Tipos de archivos de audio
-#define SOUND_ACCEPT 0
-#define SOUND_MOVE 1
-#define SOUND_CANCEL 2
+constexpr int SOUND_ACCEPT = 0;
+constexpr int SOUND_MOVE = 1;
+constexpr int SOUND_CANCEL = 2;
 
-// Opciones de menu
-#define MENU_NO_OPTION -1
+// Opciones de menú
+constexpr int MENU_NO_OPTION = -1;
 
 // Clase Menu
 class Menu
diff --git a/source/screen.h b/source/screen.h
index 4f0ce4de..1cb26613 100644
--- a/source/screen.h
+++ b/source/screen.h
@@ -10,8 +10,8 @@
 class Asset;
 class Notify;
 
-#define FILTER_NEAREST 0
-#define FILTER_LINEAL 1
+constexpr int FILTER_NEAREST = 0;
+constexpr int FILTER_LINEAR = 1;
 
 class Screen
 {
diff --git a/source/text.h b/source/text.h
index b2a512c0..011ad26b 100644
--- a/source/text.h
+++ b/source/text.h
@@ -7,10 +7,10 @@ class Sprite;
 class Texture;
 #include "utils.h"
 
-#define TXT_COLOR 1
-#define TXT_SHADOW 2
-#define TXT_CENTER 4
-#define TXT_STROKE 8
+constexpr int TXT_COLOR = 1;
+constexpr int TXT_SHADOW = 2;
+constexpr int TXT_CENTER = 4;
+constexpr int TXT_STROKE = 8;
 
 struct offset_t
 {