Don't worry about wild yeast or anything. It's way too soon to start throwing around ideas like that.
What was your OG and FG? If it has a thin mouthfeel, I would guess you have a low FG. Carbonation will help give it a thicker mouthfeel though. I would just give your beer the recommended 3 weeks in the bottle and see what it is like then.
According to the recipe the OG was supposed to be 1061 but it ended up being 1047. FG was ~1018.