OffTopic: I think it would be cool if when you touch the creeper, you get infected and turn into a zombie-ish like creature ( That would have its own custum model ) that every 4 studs, it drops a 1x1 creeper brick. If the zombie catches you, you can because infected to. I would love to make it but i can script or model :c
OnTopic: This looks like the best creeper map ive seen
Edit: Oh and also, The creeper could occasionally spawn a "Creeper Boil" with would be a green creeper brick that if its not Gotten rid of in time, it explodes and some of the creeper will fly over to the other side.