After your first turn of playing classic mode, it will show the little floating label that says the number of balls you acquired last turn. I think this is because I'm not setting the previous number of balls at the beginning of the first turn so it thinks all the balls you have you just acquired that first turn.
To trigger it, just start a classic mode game and watch for the small floating label saying "+10" or however many balls you have.
After your first turn of playing classic mode, it will show the little floating label that says the number of balls you acquired last turn. I think this is because I'm not setting the previous number of balls at the beginning of the first turn so it thinks all the balls you have you just acquired that first turn.
To trigger it, just start a classic mode game and watch for the small floating label saying "+10" or however many balls you have.