Here are some materials to help you get acquainted with Coding Jam:

• PDF guide:https://playosmo.com/static/downloads/GettingStartedWithOsmoCodingJam.pdf 
• Let's Play Osmo Coding Jam video: https://www.youtube.com/watch?v=mZoqF9cJyWo
• myOsmo Coding Jam tutorials: https://my.playosmo.com/coding-jam/
• Dueling Xylos PDF tutorial for Coding Jam: https://my.playosmo.com/assets/coding-jam/tutorials/dueling-xylos/DuelingXylos.pdf