diff --git a/include/game.h b/include/game.h
new file mode 100644
index 0000000..e353f18
--- /dev/null
+++ b/include/game.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018 Amine Ben Hassouna <amine.benhassouna@gmail.com>
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any
+ * person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the
+ * Software without restriction, including without
+ * limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software
+ * is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice
+ * shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ * ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+ * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+ * SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+ * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef GAME_H
+#define GAME_H
+
+#include <SDL2/SDL.h>
+
+#include "grid.h"
+
+
+bool Game_start(SDL_Renderer *renderer, int w, int h);
+
+#endif // GAME_H
diff --git a/src/game.c b/src/game.c
new file mode 100644
index 0000000..24fba24
--- /dev/null
+++ b/src/game.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2018 Amine Ben Hassouna <amine.benhassouna@gmail.com>
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any
+ * person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the
+ * Software without restriction, including without
+ * limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software
+ * is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice
+ * shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ * ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+ * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+ * SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+ * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "game.h"
+
+bool Game_start(SDL_Renderer *renderer, int w, int h)
+{
+    // Init grid
+    Grid grid = {0};
+
+    // Set grid dimensions
+    int padding = 50;
+    grid.rect.w = MIN(w - padding*2, h - padding*2);
+    grid.rect.h = grid.rect.w;
+
+    // Set number of cells
+    grid.xCells = 10;
+    grid.yCells = 10;
+
+    // Set cells interspace
+    grid.xInterspace = 6;
+    grid.yInterspace = 6;
+
+    // Set backgroud and border color
+    grid.backgroundColor = COLOR_DARK_GRAY;
+    grid.borderColor = COLOR_GRAY;
+
+    // Ajust size and center
+    Grid_ajustSize(&grid);
+    Grid_alignCenter(&grid, w, h);
+
+    if(!Grid_init(&grid))
+    {
+        fprintf(stderr, "Grid fail to initialize !\n");
+        return false;
+    }
+
+    // Event loop exit flag
+    bool quit = false;
+
+    // Event loop
+    while(!quit)
+    {
+        SDL_Event e;
+
+        // Get available event
+        if(SDL_WaitEvent(&e))
+        {
+            // User requests quit
+            if(e.type == SDL_QUIT)
+            {
+                quit = true;
+                break;
+            }
+        }
+
+        // Set background color
+        Utils_setBackgroundColor(renderer, COLOR_DARK_GRAY);
+
+        // Render grid
+        Grid_render(&grid, renderer);
+
+        // Update screen
+        SDL_RenderPresent(renderer);
+    }
+
+    return true;
+}
diff --git a/src/main.c b/src/main.c
index 55f2faf..37de0a9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -33,7 +33,7 @@
 
 #include <SDL2/SDL.h>
 
-#include "utils.h"
+#include "game.h"
 
 // Define screen dimensions
 #define SCREEN_WIDTH    800
@@ -71,47 +71,8 @@ int main(int argc, char* argv[])
         }
         else
         {
-            // Declare rect of square
-            SDL_Rect squareRect;
-
-            // Square dimensions: Half of the min(SCREEN_WIDTH, SCREEN_HEIGHT)
-            squareRect.w = MIN(SCREEN_WIDTH, SCREEN_HEIGHT) / 2;
-            squareRect.h = MIN(SCREEN_WIDTH, SCREEN_HEIGHT) / 2;
-
-            // Square position: In the middle of the screen
-            squareRect.x = SCREEN_WIDTH / 2 - squareRect.w / 2;
-            squareRect.y = SCREEN_HEIGHT / 2 - squareRect.h / 2;
-
-
-            // Event loop exit flag
-            bool quit = false;
-
-            // Event loop
-            while(!quit)
-            {
-                SDL_Event e;
-
-                // Wait indefinitely for the next available event
-                SDL_WaitEvent(&e);
-
-                // User requests quit
-                if(e.type == SDL_QUIT)
-                {
-                    quit = true;
-                }
-
-                // Set backgroud color
-                Utils_setBackgroundColor(renderer, COLOR_WHITE);
-
-                // Set renderer color red to draw the square
-                SDL_SetRenderDrawColor(renderer, 0xFF, 0x00, 0x00, 0xFF);
-
-                // Draw filled square
-                SDL_RenderFillRect(renderer, &squareRect);
-
-                // Update screen
-                SDL_RenderPresent(renderer);
-            }
+            // Start the game
+            Game_start(renderer, SCREEN_WIDTH, SCREEN_HEIGHT);
 
             // Destroy renderer
             SDL_DestroyRenderer(renderer);