The big difference was in the traditional zombie that was slow and easy to elude, now it is chased by a group of villagers with an ax, an electric saw is a remarkable difference.
You are right when you say that in the first part you have to climb and do many things to pass the time. I remember that my first time could not pass that part because the woman from the electric saw always killed me was an easy target since I ran out of bullets before the bell rang.
I'm glad you liked this publication.