Virgin bus survivor vs chav dead engine
It's a great proof of concept. The style is strong and running over zombies adds something to do while driving around. I can see it being successful.
There's very little fuel and sometimes it's hard to collect mission items if you miss the first time (it's hard to turn around so it's better to just drive away and try again because you ain't getting that thing otherwise). Upgrades do change quite a bit so that should remove those issues with time.