I think that the boss for Nightyard is way too easy compared to the other maps. An easy fix for this would be to increase the damage/health, but I have a more interesting solution. Since the plan for Zombie Massacre is to have a unique boss for each map, why not keep the spider theme going from Trainyard and make a stronger version of the spider?
My two ideas for this are to either give the spider a zombified green texture or give it the same shader that the ghosts have. It could have a few different attacks and would be much stronger than the current boss. Both of these would logically make sense in the ZM world.
This is a fairly simple solution that would turn the basic spider boss into a much stronger enemy with a cooler design. What are your thoughts?