To use you just have to move your mouse pointer or touch and move finger. If all ball is falling so be sure to fall the pink ball if you make another ball fall so game will over. If you touch green brick so it will be 2 ball. If blue then color of ball will change. If red then size will change. And when is your ball's size is change then after 5 seconds it will be normal again.
Actually I have made this project from my own...... It's very difficult to make this project. Here's my another game: https://scratch.mit.edu/projects/443697782https://scratch.mit.edu/about