This is a fantastic adventure and micro-setting! Here are a few key points of feedback I found.
1. The Voidweaver Class and the Shadow Blade. It sounds like you perpetually add damage capability to your weapon. I think you may want to clarify this.
2. I always want to see the overall map somewhere. I understand that space is limited for the Jam, but getting an overview of the location would be nice.
Overall, it would take a little extra time to prepare this adventure for the table, but there is a ton of valuable and excellent content here that would be fun to run!