you can already do sub emitters! I'll have to add more tutorials and things, but in the bullet died event you can call Spawn on a second manager ☺️
Trails will be incredibly difficult, I doubt I'll be able to add them particularly soon, but they are on my list. It's going to have to be a custom mesh and material, and I just don't have time for that yet 😅
What would you use a stacked manager for? Happy to add it, but I don't really know what you mean!
You're welcome to use and experiment with it in the editor, but you'll only be able to build the project during bullet hell jams. I'm giving people a bit of a grace period for any jam issues, but builds will be disabled shortly!
Thanks for the feedback 😁 and I'm looking forward to trying your game!