Pros: I played this 12 years ago. It's still one of the best action games on Newgrounds.
You can give most weapons to fellow survivors, so they can use more than just weak pistols. Shotgun is best to give to them because they reload one shot to reload the entire thing.
I never lose survivors to search. Is that a pro or a con? I'm going with pro. You can plant traps.
Cons: Running zombies? Fine.
Fat zombies with more health? Fine.
Fat, running zombies? Fine.
Zombies with weapons? Fine.
Fat zombies with weapons. Fine.
Running zombies with weapons? MOSTLY fine.
Fat, running zombies with weapons? Will be responsible for 90+ percent of your survivor's deaths. It's just that simple.
The ones with machetes are bugged. Most times, the armed zombie has to strike the fence at least once to kill a survivor. Machetes kill the survivor as soon as the zombie reaches the fence. They never have to swing. Any survivors found when you are already maxed out are wasted.
It's possible to be stuck on the last level with not enough supplies to finish. Don't skip Aspenwood. Get a few supplies there first.