It was a better play experience this time around. The few units that were in the game were definitely better balanced. I'm excited to try out more of the units that I have in the "master list" for the first release.
Some upcoming units: zombies that have no defense at all, but require a 6 to actually kill them (got to headshot the walkers to kill them, of course). There's also the zombie master that gives those slow zombies buffed stats. Adding a few ranged units too.