This is a little late, but how do I make the reward be zombies ignore you on random occasions?

Um, yea thanks for that! This map is already brutal and yet there is no little encouragements along the way telling you "good job buddy, you're doing great!"
Still, I had a good time playing this wi...

Ya thats the problem then. I had to do the same thing in order to even load up the map. Pretty easy to do it though. Theres a tutorial on the UGX wiki