Ok, I'm finally redoing my old form and I have to say... this really is easy! Nice work!
I've found one bug though (no idea if it's been reported already or not, too much to sort through in this thread.)
Anyway, if you don't end your form question with a ? it will automatically add a : to the end of your sentence, even if you don't want it.

Not a big deal, but a little annoying to assume what I want.
Anyway, excellent work!