I really like the premise of this game. Fighting your way back to life after being betrayed by the world makes for a compelling story, and I love that betrayal wasn't the end of the hero's journey. The atmosphere feels dark, but there's still hope throughout the game.
I clearly saw how Echoes and Masks were used as ingredients. I wasn't entirely sure how Molt was represented, though. Is the shattering of the Caravan Mask and returning to your body meant to represent the molt, or did I miss another interpretation?
I also had a small question about the Stress system. I understand that an Echo can only take one Stress per night, and that taking more immediately ends the night. However, I wasn't sure whether Stress resets at the beginning of the next night or if it is meant to be cumulative. I assumed it resets, but I couldn't find that explicitly stated in the rules.
Overall, I really enjoyed reading it. It has a very distinctive tone, and I especially like the idea of becoming stronger night after night while racing against the caravan before it's too late. I could easily imagine some really memorable moments coming out of this premise.