diff --git a/games/balancep0ng.py b/games/balancep0ng.py
index b761829..91d3e93 100755
--- a/games/balancep0ng.py
+++ b/games/balancep0ng.py
@@ -130,6 +130,15 @@ class B4lancePong(object):
         else:
             self.__dimension = blup.frame.FrameDimension(18, 8, 2, 1)
 
+    def gametickcb(self):
+        for i, p in enumerate(self.__players):
+            if isinstance(p, pong.PongBot):
+                print('bot in game')
+            if (isinstance(p, pong.PongBot) and \
+                self.__bplayers[i].get_player_ready()):
+                print('second player joined, cancelling current game')
+                self.__playground.cancel()
+
     def runGame(self):
         print('starting a game...')
         scoreLeft = 0
@@ -141,13 +150,13 @@ class B4lancePong(object):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         sock.connect(self.__balanceserver)
         print('connected!')
-        bplayers = [
+        self.__bplayers = [
             blup.balance_util.BalanceUtil(sock, 0),
             blup.balance_util.BalanceUtil(sock, 1)
         ]
 
-        while not (bplayers[0].get_player_ready() or
-                   bplayers[1].get_player_ready()):
+        while not (self.__bplayers[0].get_player_ready() or
+                   self.__bplayers[1].get_player_ready()):
             time.sleep(0.1)
 
         for i in range(5):
@@ -155,8 +164,8 @@ class B4lancePong(object):
             self.__out.sendFrame(frame)
 
             print('waiting for second player...')
-            if (bplayers[0].get_player_ready() and
-                bplayers[1].get_player_ready()):
+            if (self.__bplayers[0].get_player_ready() and
+                self.__bplayers[1].get_player_ready()):
                 break
             time.sleep(1)
 
@@ -164,9 +173,9 @@ class B4lancePong(object):
         for i in [0, 1]:
             paddle = self.__playground.leftPaddle if i == 0 else \
                      self.__playground.rightPaddle
-            if bplayers[i].get_player_ready():
+            if self.__bplayers[i].get_player_ready():
                 player = BalanceBoardPlayer(self.__playground, paddle,
-                                            bplayers[i])
+                                            self.__bplayers[i])
             else:
                 player = pong.PongBot(self.__playground, paddle, 3)
             self.__players.append(player)
@@ -184,7 +193,10 @@ class B4lancePong(object):
         self.__out.sendFrame(frame)
         time.sleep(1)
 
-        while max(scoreLeft, scoreRight) < __MAX_SCORE__:
+        self.__playground.addGameTickCallback(self.gametickcb)
+
+        while (max(scoreLeft, scoreRight) < __MAX_SCORE__ and
+               not self.__playground.cancelled):
             winner = self.__playground.play()
             if winner is self.__playground.leftPaddle:
                 scoreLeft += 1
@@ -192,13 +204,14 @@ class B4lancePong(object):
                 scoreRight += 1
             pong.displayScore(self.__out, self.__dimension, scoreLeft, scoreRight, 3000)
 
-        for i in range(3):
+        if not self.__playground.cancelled:
+            for i in range(3):
+                frame = blup.frame.Frame(self.__dimension)
+                self.__out.sendFrame(frame)
+                time.sleep(0.5)
+                pong.displayScore(self.__out, self.__dimension, scoreLeft, scoreRight, 500)
             frame = blup.frame.Frame(self.__dimension)
             self.__out.sendFrame(frame)
-            time.sleep(0.5)
-            pong.displayScore(self.__out, self.__dimension, scoreLeft, scoreRight, 500)
-        frame = blup.frame.Frame(self.__dimension)
-        self.__out.sendFrame(frame)
 
         self.__playground = None
         self.__players = []