I am making a pong type game. My questions is how do I make it change levels once all of my sprites are gone? Any ideas are helpful

So why would all of the sprites go away? And would a new level just summon them again? I think it's best to hide all of the sprites when the level is over, and when you get to a new level make them show, and put them in position.

WHen the ball hits the sprits you score points and they disappear. My question is how do I code the game to recognize when the last sprite is hit that level is over and start the next level