Congratulations, that's a very nice effect! Hope you'll check out more of the learning content offered in the Illustrator section. In particular, you may enjoy a tutorial on the Shape Builder tool that's structured as a game. How to use Shape Builder | Adobe Illustrator CC tutorials
To access other tutorials, go to the main Illustrator section. Learn Illustrator, get help and support | Adobe Illustrator CC. Then click on "Show all tutorials," followed by "Learn Essentials" right below the large image. You'll find plenty of tutorials here that show you how to learn features and create unique effects. Good luck!