Just a quick clarification I saw that you had credited JSFXR, What was lacking was more of a explanation as to how it differed or what new it brought. Kind of like what you just wrote! :)
Viewing post in rust_sfxr jam comments
I did suspect you'd seen it. I mostly wanted to make sure that bit of context came back up to the jam entry page too, since jsfxr got mentioned here.
For jams in general, I need to start allowing myself more time to work on the project page; that's a bit (especially when solo) I'm in the habit of leaving to the very last minute.