diff --git a/gamedata/objects/ingame/manager.py b/gamedata/objects/ingame/manager.py
index 409a264..d111c0a 100644
--- a/gamedata/objects/ingame/manager.py
+++ b/gamedata/objects/ingame/manager.py
@@ -1,17 +1,28 @@
 from gamedata.objects.base import BaseObject
+from gamedata.objects.ingame.lemmings import Lemming
+from gamedata.objects.ingame.tiles import Tiles
 
 class Manager(BaseObject):
     def __init__(self,game):
         super().__init__(0,0,game)
-
         self.score = 0
-        self.spawntimer = game.lib.Timer(30) # Time elapsing each lemming spawn
-        self.scoreratio = 1 # Points earned per seconds and per lemming
+        self.lives = 5
+        self.basetime = 10
+        self.steptime = 2
+        self.spawntimer = game.lib.Timer(self.basetime) # Time elapsing each lemming spawn
+        self.scoreratio = 0.4 # Points earned per seconds and per lemming
+
+        # Summon the tiles
+        self.tiles = Tiles(50,50,game)
+        game.gameloop.summon(self.tiles)
 
     def step(self):
         for i in self.game.gameloop.findname("Lemming"):
             self.score+=self.scoreratio*self.game.dt
-        print(int(self.score))
+        if self.spawntimer.tick(self.game.dt):
+            self.game.gameloop.summon(Lemming(100,100,self.game))
+            self.basetime+=self.steptime
+            self.spawntimer = self.game.lib.Timer(self.basetime)
 
     def draw(self):
         pass
diff --git a/gamedata/objects/ingame/tiles.py b/gamedata/objects/ingame/tiles.py
new file mode 100644
index 0000000..306e0e8
--- /dev/null
+++ b/gamedata/objects/ingame/tiles.py
@@ -0,0 +1,41 @@
+from gamedata.objects.base import BaseObject
+from math import sqrt
+import random
+
+# Tiles object, displaying and managing the play grid
+
+class Tiles(BaseObject):
+
+    def __init__(self,x,y,game,nbcells=20,cellsize=30):
+
+        super().__init__(x,y,game,nbcells*cellsize,nbcells*cellsize)
+
+        self.nbcells = nbcells
+        self.cellsize = cellsize
+
+        self.grid = self.gengrid(nbcells,nbcells)
+
+    def gengrid(self,w,h):
+        # 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)
+
+        for i in range(nb_rects):
+            # Generating the rects
+            rectw = random.randint(3,7)
+            recth = random.randint(3,7)
+            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
+
+        return grid
+
+    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])