Hey! I just tried your new version. I think having more balls quicker in the pool definitely adds some extra fun! I liked it. And the combo system is a really good idea as well. Maybe there's something to be done, expanding your idea.
I've played a lot back in the day the game threes, 2048 and now Suika Game, which share a bit the same concept of matching pieces that grow. I was wondering if it would be a good idea to do as these games do, and not always throw a ball with number 1. Randomly you'll throw mostly ones, but sometimes you will throw a number as high as the maximum number already on the pool. In these games, this adds some random factor to the game (sometimes a bit unfair) but it helps to spice things up a bit, and wanting you play another game. This will help as well to make each match a bit faster since the numbers will grow more, and I think it could help with the pace of the game.
What do you think?