Apparently, not everything was "backwards", since they didn't wish for everything to be different. But a lot of things were definitely backwards.
Jon was shocked to see that both his and Karyn's head were turned around so when they looked down at themselves, they were looking at their backs.
It was very difficult to walk around, but soon they got the hang of it and walked to the window. People walking around outside didn't seem to have any difficulty walking. Some were even jogging.
"This is too weird, Jon."
"Yeah, and it's gonna last a week. I wonder what else is different."