Some are a bit bright for my taste, but I like them. They're very active
About bubblegum stars, I've tweaked the movement some so it responds to the treb and mid better. I bound them to q variables in the preset's per frame code instead of using them in the wave per frame code directly, just habit. You can do it either way.
Also the presets with errors in the shaders will just ignore that shader until the error is fixed. Presets like the Red Blue ones. The warp shader is ignored completely because it's got an error. Overall just some cleaning up to do, some code that's not used in the shaders for instance.
Just a few constructive criticisms
keep at it they're a very good start. I'm still learning too