Unfortunately we realize that objects don't seem to be saving on reload so you'd have to start over if you wanted to complete the area. Sorry!
well, I actually did and I got to the finish screen .. but i got there without doing the quest for the big bunny (last area) and i went back again but there was no big bunny right from the start I finished without collecting all the origami's (there was only 1 missing) so I wasn't able to discover what those were for but it was a good adventure and I liked it.