Thanks for the BulletFury demo project! It looks pretty promising and I was able to get it working on Unity 2020.3.33 URP.
One request... Can you update the dll compile directory so the plugin doesn't break if you move the BulletFury folder into a sub-directory? (error message below) I like keeping my project folders organized and it's a pet peeve when assets completely break if you simply move them to a sub-directory.
`error CS0006: Metadata file '/Users/B/.../_Game_Jams/BulletHell22/Assets/BulletFury/BulletFury/Plugins/BulletFury.dll' could not be found`