diff --git a/assets-cg/bground.png b/assets-cg/bground.png
index b40d9a0..1153257 100644
Binary files a/assets-cg/bground.png and b/assets-cg/bground.png differ
diff --git a/src/display_engine.c b/src/display_engine.c
index 021ceef..0861d46 100644
--- a/src/display_engine.c
+++ b/src/display_engine.c
@@ -7,8 +7,16 @@
 
 void display_background(const int background)
 {
+    /**
+     * 1 - map
+     * 2 - navigation menu
+     * 3 - info menu
+     * 4 - grid
+     * 5 - display message
+     * 6 - upgrade menu
+     **/
     extern const bopti_image_t img_bground;
-    dsubimage(0, 0, &img_bground, 0, 65 * (background - 1), 128, 64, DIMAGE_NONE);
+    dsubimage(0, 0, &img_bground, 0, 224 * (background - 1), 396, 224, DIMAGE_NONE);
 }
 
 
@@ -116,7 +124,7 @@ void display_mutation(const int table[4][8], const struct cursor c, const int mu
     extern bopti_image_t img_cursor;
 
     dclear(C_WHITE);
-    display_background(5);
+    display_background(4);
     for (int i = 0 ; i < 4 ; i++)
     {
         for (int j = 0 ; j < 8; j++)
@@ -140,7 +148,7 @@ void display_mutation_buy(const struct cursor c, const int mutation_menu, const
 
     dclear(C_WHITE);
     
-    display_background(4);
+    display_background(3);
     dsubimage(3, 21, &img_mutations, 16 * (mutation_menu - 1), 16 * (id - 1), 15, 15, DIMAGE_NONE);
 
     dprint(47, 25, C_BLACK, mutation_data->name);
@@ -165,7 +173,7 @@ void display_mutation_description(const char *name, const char *description, con
 
     dclear(C_WHITE);
 
-    display_background(8);
+    display_background(6);
     dsubimage(3, 21, &img_mutations, 16 * (mutation_menu - 1), 16 * (id - 1), 15, 15, DIMAGE_NONE);
     dprint(47, 25, C_BLACK, name);
     
@@ -189,10 +197,10 @@ void display_message(char *msg)
     int decalage = 0;
 
     dclear(C_WHITE);
-    display_background(7);
+    display_background(5);
     for (int i = 0; i < 5; i ++)
     {
-        dtext_opt(54, 6 * i + 4, C_BLACK, C_WHITE, 0, 0, msg + decalage, 11);
+        dtext_opt(150, 6 * i + 4, C_BLACK, C_WHITE, 0, 0, msg + decalage, 11);
         
         int offset = 0;
         while (msg[decalage + offset] != '\0') offset += 1;
diff --git a/src/main.c b/src/main.c
index 63ca5dc..65472cf 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,7 @@
 /*
   Project name ......: Plague
   Version ...........: 1.3.9
-  Last modification .: 8 June 2021
+  Last modification .: 30 June 2021
 
   code and assets provided with licence :
   GNU General Public Licence v3.0
@@ -39,11 +39,11 @@ int main(void)
     title_screen();
 
     // Game statistics
-    struct plane plane_1 = {22, 20, 2, 84, 20, 22, 20, 0};
-    struct plane plane_2 = {34, 20, 3, 34, 44, 34, 20, 0};
-    struct plane plane_3 = {68, 44, 1, 68, 20, 68, 44, 0};
-    struct plane plane_4 = {104, 20, 3, 104, 50, 104, 20, 0};
-    struct plane plane_5 = {68, 44, 4, 34, 44, 68, 44, 0};
+    struct plane plane_1 = {81, 49, 2, 308, 49, 81, 49, 0};
+    struct plane plane_2 = {115, 49, 3, 115, 119, 115, 49, 0};
+    struct plane plane_3 = {224, 119, 1, 224, 49, 224, 119, 0};
+    struct plane plane_4 = {224, 141, 2, 337, 141, 224, 141, 0};
+    struct plane plane_5 = {224, 119, 4, 115, 119, 224, 119, 0};
 
 
     struct game current_game =
@@ -67,7 +67,7 @@ int main(void)
 
         .planes = {&plane_1, &plane_2, &plane_3, &plane_4, &plane_5, NULL},
 
-        .grid = {64, 128, NULL},
+        .grid = {224, 396, NULL},
     };
 
     // Allocate memory
@@ -169,10 +169,10 @@ int main_loop(struct game *current_game)
 
         // Special actions : quit and manage mutations
         if (background == -1) end = 1;
-        if (background == 5)
+        if (background == 4)
         {
             mutation_select(current_game, mutation_menu);
-            background = 3;
+            background = 2;
         }
     }