In the previous level, you need to keep tapping the screen to increase the number of cookies you get. In the latter level, you can hire workers to help you bake more cookies. In addition, you can also buy new biscuit production factories, such as farms, bakeries, and factories, to produce more biscuit. Interestingly, the number of cookies will continue to grow even after you are offline, so do not worry, just start the game and play!