Click on the drum. When you have enough beats you can upgrade and get another drum.
This project has been created by the Raspberry Pi Foundation for young learners to develop their programming skills. To make this project yourself go to: https://projects.raspberrypi.org/en/projects/drum-star. To see other projects in More Scratch, go to: https://projects.raspberrypi.org/en/pathways/more-scratch.