diff --git a/Plague.g1a b/Plague.g1a
index 779e458..39d689d 100644
Binary files a/Plague.g1a and b/Plague.g1a differ
diff --git a/README.md b/README.md
index ca09346..97ab09b 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ Lancez le jeu, et pressez n'importe quelle touche pour passer l'écran principal
   - [OPTN] permet d'afficher / cacher la barre en dessous du monde qui vous affiche vos points ADN et la barre de recherche des humains.
   - [VARS] permet de passer au gros du jeu : les mutations. Ce menu vous affiche vos points ADN, mais aussi les mutations sélectionnées ainsi que vos points de contagion, de sévérité, et de létalité. Dans ce menu, vous pouvez modifier tout cela.
   - [x^2] permet d'accéder au menu statistique qui vous affiche les stats sur les humains. La barre symbolise le pourcentage de la population totale : donc la somme de toutes les barres doit donner une seule barre entière.
+  - [→] active (ou désactive) le mode rapide. Ce mode vous permet d'avancer 10 plus vite dans le jeu.
 
 Dans les menus déplacez-vous grâce aux touches fléchées, validez avec [SHIFT] et annulez avec [ALPHA].
 
diff --git a/src/core.c b/src/core.c
index e1ed73d..53d0925 100644
--- a/src/core.c
+++ b/src/core.c
@@ -56,10 +56,13 @@ int next_frame(struct game *current_game)
         }
     }
 
+    int limit_tick = LIMIT_TICK;
+    if (current_game->boost) limit_tick = floor(LIMIT_TICK / 10);
+
     current_game->time += ENGINE_TICK;
     current_game->total_time += ENGINE_TICK;
 
-    if (current_game->time > LIMIT_TICK)
+    if (current_game->time > limit_tick)
     {
         // Reset internal clock
         current_game->time = 0;
@@ -79,7 +82,8 @@ int next_frame(struct game *current_game)
         // Check the end of the game
         if (!current_game->humans[1])
         {
-            if (current_game->humans[0]) message("VOUS AVEZ PERDU.");
+            
+            if (current_game->humans[0] || current_game->humans[3] < current_game->humans[2]) message("VOUS AVEZ PERDU.");
             else message("VOUS AVEZ GAGNE !");
             return 0;
         }
@@ -88,10 +92,11 @@ int next_frame(struct game *current_game)
 }
 
 
-int get_inputs(const int background, int *mutation_menu)
+int get_inputs(const int background, int *mutation_menu, int *boost)
 {
     int key = rtc_key();
 
+    if (key == KEY_ARROW) *boost = (*boost + 1) % 2;
     if (key == KEY_OPTN && (background == 1 || background == 2)) return (background % 2) + 1;
     if (key == KEY_VARS)
     {
@@ -107,7 +112,7 @@ int get_inputs(const int background, int *mutation_menu)
     if (key == KEY_ALPHA)
     {
         if (background == 5) return 3;
-        if (background != 1 && background != 2) return 1;
+        else return 1;
     }
     if (key == KEY_EXIT && (background == 1 || background == 2)) return -1;
 
diff --git a/src/core.h b/src/core.h
index cb46e65..a1de721 100644
--- a/src/core.h
+++ b/src/core.h
@@ -47,8 +47,8 @@ struct game
     // Humans stats : healthy, infected, dead, healed
     int humans[4];
 
-    // Time
-    int time, total_time;
+    // Time and boost (10 times faster)
+    int time, total_time, boost;
 
     // Planes
     struct plane *planes[NB_PLANES + 1];
@@ -87,7 +87,7 @@ struct cursor
 };
 
 // get_inputs : detect and manage inputs
-int get_inputs(const int background, int *mutation_menu);
+int get_inputs(const int background, int *mutation_menu, int *boost);
 
 // next_frame : compute the plane's positions
 int next_frame(struct game *current_game);
diff --git a/src/data.c b/src/data.c
index ce19a94..89806a2 100644
--- a/src/data.c
+++ b/src/data.c
@@ -34,7 +34,7 @@ const struct mutation abilities_data[6] =
 
 const struct mutation transmissions_data[13] =
 {
-    { 5,  0, 0,  9, 0, "AIR 1", "TRANSMISSION PAR L'AIR"},
+    { 5,  0, 0,  5, 0, "AIR 1", "TRANSMISSION PAR L'AIR"},
     {10, 10, 0, 15, 0, "AIR 2", "TRANSMISSION PAR L'AIR"},
     {20, 10, 0, 20, 0, "AIR 3",  "TRANSMISSION PAR L'AIR"},
     {40, 15, 0, 30, 0, "AEROSOL", "TRANSMISSION PAR L'AIR ET PAR L'EAU"},
@@ -44,7 +44,7 @@ const struct mutation transmissions_data[13] =
     {40, 10, 0, 25, 0, "ANIMAL 2", "CAPACITE DE TRANSMISSION HOMME-ANIMAL"},
     {20,  0, 0, 15, 0, "OISEAU 1", "LES OISEAUX TRANSMETTENT LE VIRUS"},
     {40, 10, 0, 25, 0, "OISEAU 2", "LES OISEAUX TRANSMETTENT LE VIRUS"},
-    {10,  0, 0,  8, 0, "SANG 1", "LE VIRUS SE TRANSMET PAR LE SANG"},
+    {10,  0, 0,  10, 0, "SANG 1", "LE VIRUS SE TRANSMET PAR LE SANG"},
     {20, 10, 0, 15, 0, "SANG 2", "LE VIRUS SE TRANSMET PAR LE SANG"},
     {40, 15, 0, 25, 0, "SANG 3", "LE VIRUS SE TRANSMET PAR LE SANG"},
 };
diff --git a/src/display_engine.c b/src/display_engine.c
index 6821d0e..12b7978 100644
--- a/src/display_engine.c
+++ b/src/display_engine.c
@@ -58,7 +58,7 @@ void display_foreground(const int background, const struct game *current_game, c
             }
 
             // Status bottom bar 
-            int length = 74 * current_game->research / current_game->limit;
+            int length = 73 * current_game->research / current_game->limit;
             dprint(9, 58, C_BLACK, "%d", current_game->dna);
 
             dline(51, 60, 51 + length, 60, C_BLACK);
diff --git a/src/epidemic_engine.c b/src/epidemic_engine.c
index aa45cc8..e3762ea 100644
--- a/src/epidemic_engine.c
+++ b/src/epidemic_engine.c
@@ -41,8 +41,8 @@ void epidemic_simulation(struct game *current_game)
     uint8_t *current_grid = calloc(current_game->grid.width * current_game->grid.height, sizeof(uint8_t));
     init_tab(current_game->grid.width * current_game->grid.height, current_grid, current_game->grid.data);
 
-    int healed_rate =  floor((100 * current_game->research / current_game->limit));
-    if (!bernoulli(healed_rate)) healed_rate = 0;
+    int healed_rate =  0;
+    if (current_game->research == current_game->limit) healed_rate = rand() % 26;
 
     // Make the epidemic grid evolove
     for (int i = 0; i < current_game->grid.width; i ++)
diff --git a/src/main.c b/src/main.c
index 383ac60..59cfc0e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,6 @@
 /*
   Project name ......: Plague
-  Version ...........: 1.3.1
+  Version ...........: 1.3.2
   Last modification .: 4 June 2021
 
   code and assets provided with licence :
@@ -59,7 +59,7 @@ int main(void)
         .priority = 0,
         .humans = {0, 1, 0, 0},
 
-        .time = 0, .total_time = 0,
+        .time = 0, .total_time = 0, .boost = 0,
 
         .planes = {&plane_1, &plane_2, &plane_3, &plane_4, &plane_5, NULL},
 
@@ -152,9 +152,10 @@ int main_loop(struct game *current_game)
 
         // Compute the motion of planes, DNA points and infectious model
         to_save = next_frame(current_game);
+        if (!to_save) end = 1;
         
         // Get inputs from the keyboard and manage it
-        background = get_inputs(background, &mutation_menu);
+        background = get_inputs(background, &mutation_menu, &current_game->boost);
 
         // Special actions : quit and manage mutations
         if (background == -1) end = 1;
diff --git a/src/mutation_engine.h b/src/mutation_engine.h
index 8b2ec28..8a5d8da 100644
--- a/src/mutation_engine.h
+++ b/src/mutation_engine.h
@@ -5,7 +5,7 @@
 #include "display_engine.h"
 
 // Basic limit research
-#define RESEARCH_LIMIT 300
+#define RESEARCH_LIMIT 250
 
 // mutation_table : contain the map of the mutation available
 struct mutation_table