Oh thanks! I'm currently working on a steam/final release for this and a looper has been something I've been stuck on for a whiiiile. It's been super tough to design and code and I'm starting to lean more towards offering it as a plugin format for your standard DAW as any type of looping would be way better/smoother there.
That being said, you can record desktop audio in audacity and use that as a free tool for layering and looping. Some professional musician friends of mine use it to record whole songs.
Thanks for playing!