In that case I think the strategy would be to create a lead and then let all the balls through so that the game ends. At the start I was winning but at some point I wasn't able to keep up anymore.
Ah, thanks. I paused and came back here, saw this comment, then went back and let the balls go by. Okay, I'll be honest, I accidentally unpaused early and they went by before I had a chance to think about whether I had enough of a lead. I did! Final score 405, the difference between my score and the bot's.
I didn’t know it was when no balls were left. So this time I got an initial game, jumped ahead after using a special, then let all balls pass. I won by two points! :)