Oh, gotcha. Never heard of JummBox and jsfxr before, but yeah, they seem like pretty decent free tools.
Cool detail about the click sfx, didn't notice it, but it's also been way too long since I touched my GBC (and it's in another city). But that's a very nice touch!
Don't worry about the VST if you're not familiar with those, if you got your workflow working already - then it's cool. Just wanted to share stuff that I thought might be helpful.