diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7455ba..8470387 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,10 +13,16 @@ set(SOURCES
   src/main.c
 )
 
+set(ASSETS)
+
 set(ASSETS_fx
-  
+  assets-fx/large_tileset.png
+  assets-fx/large_water.png
+  assets-fx/title.png
 )
 
+set(ASSETS_cg)
+
 fxconv_declare_assets(${ASSETS} ${ASSETS_fx} ${ASSETS_cg} WITH_METADATA)
 
 add_executable(myaddin ${SOURCES} ${ASSETS} ${ASSETS_${FXSDK_PLATFORM}})
@@ -27,6 +33,6 @@ if("${FXSDK_PLATFORM_LONG}" STREQUAL fx9860G)
   generate_g1a(TARGET myaddin OUTPUT "CalcCity.g1a"
     NAME "CalcCity" ICON assets-fx/icon.png)
 elseif("${FXSDK_PLATFORM_LONG}" STREQUAL fxCG50)
-  generate_g3a(TARGET myaddin OUTPUT "MyAddin.g3a"
-    NAME "MyAddin" ICONS assets-cg/icon-uns.png assets-cg/icon-sel.png)
+  generate_g3a(TARGET myaddin OUTPUT "CalcCity.g3a"
+    NAME "CalcCity" ICONS assets-cg/icon-uns.png assets-cg/icon-sel.png)
 endif()
diff --git a/README.md b/README.md
index 02ea0c4..34d2784 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
 # CalcCity
 
-A redesign of a management game like Sim's City.
\ No newline at end of file
+## Presentation
+
+This game is a redesign of [CalcCity](https://www.planet-casio.com/Fr/programmes/programme1062-1-calccity-v3-menno-jeux-add-ins.html), a management game like Sim's City.
+
+## License
+
+All rights reserved.
\ No newline at end of file
diff --git a/assets-fx/icon.bmp b/assets-fx/icon.bmp
deleted file mode 100644
index 50f4b69..0000000
Binary files a/assets-fx/icon.bmp and /dev/null differ
diff --git a/assets-fx/icon.png b/assets-fx/icon.png
new file mode 100644
index 0000000..44ab7e2
Binary files /dev/null and b/assets-fx/icon.png differ
diff --git a/assets-fx/large_tileset.png b/assets-fx/large_tileset.png
new file mode 100644
index 0000000..05e0ecf
Binary files /dev/null and b/assets-fx/large_tileset.png differ
diff --git a/assets-fx/large_water.png b/assets-fx/large_water.png
new file mode 100644
index 0000000..4e611fe
Binary files /dev/null and b/assets-fx/large_water.png differ
diff --git a/assets-fx/title.png b/assets-fx/title.png
new file mode 100644
index 0000000..af7c008
Binary files /dev/null and b/assets-fx/title.png differ
diff --git a/src/calccity.c b/src/calccity.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/calccity.h b/src/calccity.h
index 7b3612d..2a8cc5b 100644
--- a/src/calccity.h
+++ b/src/calccity.h
@@ -1,45 +1,44 @@
 #ifndef _CALCCITY_H
 #define _CALCCITY_H
 
-struct calccity = 
+struct calccity
 {
 	// human's statistics = {happyness, health, education, housing, work, food} 
-	signed long humans[6] = {0};
+	signed long humans[6];
 
 	// population evolution = {population, birth_rate, death_rate, immigration, emigration}
-	signed long population[5] = {0};
+	signed long population[5];
 
 	// trade statistics = {import, export, production, commercial, industrial, annual_cost}
-	signed long trade[6] = {0};
+	signed long trade[6];
 
 	// production = {water, power}
-	signed long production[2] = {0};
+	signed long production[2];
 
 	// consumption = {water, power}
-	signed long consumption[2] = {0};
+	signed long consumption[2];
 
-	// some others statistics = {crime, safety, fire_hazard, nuclear_hazard, pollution, transport, grabage, graves}
-	signed long misc[8] = {0};
+	// some others statistics = {treasure, crime, safety, fire_hazard, nuclear_hazard, pollution, transport, grabage, graves}
+	signed long misc[9];
 
 	// taxes in percents on {housing, trade, industry, export}
-	int taxes[4] = {10, 10, 10, 10};
+	int taxes[4];
 
 	// fund in percents on {police, fireman, education, heathcare}
-	int funds[4] = {0};
+	int funds[4];
 
 	// in-game time
-	int month = 1, year = 1900;
-	int blinker = 0;
+	int month, year;
+	int blinker;
 
 	// in-game options
-	bool disaster = true;
-	bool show_fps = false;
-	int time_speed = 30;
+	bool disaster;
+	int time_speed;
 
 };
 
 
-struct camera = 
+struct camera
 {
 	int x, y;
 	int zoom;
@@ -48,9 +47,9 @@ struct camera =
 };
 
 
-struct map = 
+struct map
 {
-	unsigned char map_data[50][50];
+	unsigned char data[50][50];
 };
 
 
diff --git a/src/main.c b/src/main.c
index 7115429..a678939 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,8 +1,69 @@
 #include <gint/display.h>
 #include <gint/keyboard.h>
+#include <gint/std/stdlib.h>
+#include <gint/std/string.h>
+
+#include "calccity.h"
+
+void title_screen(void);
+void default_values(struct calccity *current_game, struct camera *camera, struct map *map);
+
 
 int main(void)
 {
+	title_screen();
+
+	struct calccity calccity;
+	struct camera camera;
+	struct map map;
+	default_values(&calccity, &camera, &map);
 
 	return 1;
 }
+
+
+void title_screen(void)
+{
+	extern const bopti_image_t img_title;
+	dclear(C_WHITE);
+
+	dimage(0, 0, &img_title);
+	dupdate();
+
+	getkey();
+}
+
+
+void default_values(struct calccity *calccity, struct camera *camera, struct map *map)
+{
+	// Initialisation of struct calccity
+	memset(calccity, 0, sizeof *calccity);
+
+	// Treasure
+	calccity->misc[0] = 500000;
+
+	for (int i = 0; i < 4; i++)
+		calccity->taxes[i] = 10;
+
+	calccity->month = 1;
+	calccity->year = 1900;
+	calccity->blinker = 0;
+
+	calccity->disaster = true;
+	calccity->time_speed = 30;
+
+
+	// Initialisation of struct camera
+	memset(camera, 0, sizeof *camera);
+	camera->cursor_x = 64;
+	camera->cursor_y = 32;
+
+
+	// Initialisation of struct map
+	for (int y = 0; y < 50; y++)
+	{
+		for (int x = 0; x < 50; x++)
+			map->data[y][x] = 48 + rand() % 2;
+	}
+
+}
\ No newline at end of file