Can you add a video, link, pictures of the game? We can not know which game you mean without an example. There are many games that are called the same, and they are different.
Video link: I dont understand how I could possible make the new "row of block" appear after each turn, how to get the balls to stop where they land while waiting for the next shot.
Its not possible to make game like ballz with Buildbox. I think you can try a simpler version of ballz.