Cool concept! I dig it.
The annoying part was getting stuck on stuff. It does not play well with the fantasy of being a construction vehicle that mows down stuff with ease. I think it would be good to make the "broken" stuff not collide with you anymore and make everything about to be knocked down/broken.
Cheers for the feedback I was thinking about that very thing last night as it's a consistent complaint. I don't want to remove all collisions as then you couldn't push a fence into a zombie to kill them. What I was thinking was to destroy any object that ends up beneath the digger which would stop the wheel colliders getting stuck on the objects. I'll give it a go later in the week.
