diff --git a/gamedata/assets/collisionmap.png b/gamedata/assets/collisionmap.png
new file mode 100644
index 0000000..fa8c318
Binary files /dev/null and b/gamedata/assets/collisionmap.png differ
diff --git a/gamedata/assets/ingame.png b/gamedata/assets/ingame.png
new file mode 100644
index 0000000..cbd26f1
Binary files /dev/null and b/gamedata/assets/ingame.png differ
diff --git a/gamedata/assets/tiles_packed.png b/gamedata/assets/tiles_packed.png
index e21fc50..4c989b6 100644
Binary files a/gamedata/assets/tiles_packed.png and b/gamedata/assets/tiles_packed.png differ
diff --git a/gamedata/game.py b/gamedata/game.py
index d26d1cd..5e910c7 100644
--- a/gamedata/game.py
+++ b/gamedata/game.py
@@ -48,7 +48,7 @@ class Game():
         self.globals["cameray"] = 0
         self.globals["scamerax"] = 3
         self.globals["scameray"] = 0
-        self.globals["debug"] = True
+        self.globals["debug"] = False
         self.globals["highscore"] = 0
         self.scaleCamera()
 
diff --git a/gamedata/objects/ingame/manager.py b/gamedata/objects/ingame/manager.py
index f7c8fb7..ca22a28 100644
--- a/gamedata/objects/ingame/manager.py
+++ b/gamedata/objects/ingame/manager.py
@@ -22,7 +22,7 @@ class Manager(BaseObject):
         self.endrect.fill([0]*3)
 
         # Summon the tiles
-        self.tiles = Tiles(50,50,game)
+        self.tiles = Tiles(288,0,game)
         game.gameloop.summon(self.tiles)
         # Spawn the first one
         self.game.gameloop.summon(Spawner(self.game,self.tiles))
diff --git a/gamedata/objects/ingame/tiles.py b/gamedata/objects/ingame/tiles.py
index 51591e7..39c9afc 100644
--- a/gamedata/objects/ingame/tiles.py
+++ b/gamedata/objects/ingame/tiles.py
@@ -6,7 +6,7 @@ import random
 
 class Tiles(BaseObject):
 
-    def __init__(self,x,y,game,nbcells=20,cellsize=30):
+    def __init__(self,x,y,game,nbcells=22,cellsize=32):
 
         super().__init__(x,y,game,nbcells*cellsize,nbcells*cellsize)
 
@@ -15,24 +15,25 @@ class Tiles(BaseObject):
 
         self.saferadius = 2
 
-        self.grid = self.gengrid(nbcells,nbcells,minsize=self.saferadius*2+1)
+        self.grid = self.gengrid(game.sprite_lib["collisionmap.png"])
         self.spawns = self.getspawnpoints(self.grid,saferadius=self.saferadius)
 
-    def gengrid(self,w,h,minsize=3,randrange=4):
-        # Generating various rectangles on a map
-        grid = [ [0 for x in range(w)] for y in range(h) ]
-        nb_rects = int(sqrt(w*h)/1.5+0.5)
+        self.debugcell = game.pygame.Surface([cellsize]*2)
+        self.debugcell.fill([255]*3)
+        self.debugcell.set_alpha(100)
 
-        for i in range(nb_rects):
-            # Generating the rects
-            rectw = random.randint(0,randrange)+minsize
-            recth = random.randint(0,randrange)+minsize
-            rectx = random.randint(0,w-rectw)
-            recty = random.randint(0,h-recth)
-
-            for offx in range(rectw):
-                for offy in range(recth):
-                    grid[offy+recty][offx+rectx]=1
+    def gengrid(self,sprite):
+        # Generating a list of lists based on an image
+        width,height = sprite.get_size()
+        grid = []
+        for y in range(height):
+            line = []
+            for x in range(width):
+                if sprite.get_at((x,y))!=(0,0,0,255):
+                    line.append(1)
+                else:
+                    line.append(0)
+            grid.append(line)
 
         return grid
 
@@ -50,12 +51,14 @@ class Tiles(BaseObject):
         return spawns
 
     def draw(self):
-        # Drawing the grid
-        for y in range(len(self.grid)):
-            for x in range(len(self.grid[y])):
-                if self.grid[y][x]==1:
-                    self.game.pygame.draw.rect(self.game.window,[255]*3,[self.rect[0]+x*self.cellsize,self.rect[1]+y*self.cellsize,self.cellsize,self.cellsize])
-        # Draw spawn points
+        # Drawing the ground
+        self.game.window.blit(self.game.sprite_lib["ingame.png"],(0,0))
         if self.game.globals["debug"]:
+            # Drawing the grid
+            for y in range(len(self.grid)):
+                for x in range(len(self.grid[y])):
+                    if self.grid[y][x]==1:
+                        self.game.window.blit(self.debugcell,[self.rect[0]+x*self.cellsize,self.rect[1]+y*self.cellsize])
+            # Draw spawn points
             for point in self.spawns:
                 self.game.pygame.draw.circle(self.game.window,[100,100,0],point,radius=3)