Stormrage
Ever Present Taskmaster
What gfx do they use? 

I haven't actually noticed these changes yetTesters... Do you guys like the Zombie Bat and Bat Bomber re-colored Reddish Brown without Civ Specific color better? The Boulder animation was also added so they "Bomb" with them rather than just fly over as they did before.
The one simple adjustment that would make this game unbelievably difficult to win would be to set Monster Zombies so they can travel on all terrain! That could be a possible future adjustment but they would have to be set with different Stats if that was ever done. As they are now, it provides players time as well as prevent the Monster Zombies from being able to attack from Skyscrapers, Trees and Houses where they would be much stronger. IF Monster Zombies were set to use all terrain, they would return to their status as the Greatly Feared Zombie Unit because the Zombies build many of them.
Virote_Considon... Yes, the Monster Zombies were only able to use the Streets before as well as now. Units set as "wheeled" can only use the Street Terrain, this includes Cars and all wheeled vehicles. The reason you see the various vehicles and Monster Zombies move on some terrain other than the actual streets is because wheeled units can travel on those terrains even though they are not streets...same as any CIV Game. IF there was a way to keep All wheeled units ONLY on the Streets, that would have been done.
odintheking... You have to have the Supplies that are needed as well as upgrade them in a building that has a Machine Shop...Hannibal's Aparment or the Garage.