Oh sorry, I am very glad you asked.
Exp is gained in this jam (the Panic Horror Jam) by completing challenges. You can view the details on the front page.
EXP is gained from CHALLENGES. You will store EXP via physical notebook/notepad/whatever. You will send me EXP at the end of the jam. I will REWARD you for your EXP LEVEL, I call the SWORDS for whatever reason, and the REQUIRED EXP for each one is intentionally hidden.
The rewards currently consist of one thing : a music pack. However, I am moving towards getting contacts for more rewards.
There will also be Streamers for the Panic Horror Jam. I am also contacting these.
I hope this helps!