Combine the Same Number Balls in the Field. When each combines together, the number of ball makes the total number. When all the balls are combined and become one, the Game is Finish. If you drop the ball from the field or you can't find a route to combine the balls, The game is over. The different between 1 and 2. 2 has no ads. The stages are all different. If you like 1, I might want you to buy 2.