When I played this level I goofed around for a while.... figured I'd take it easy and play with things...but the Creeper spores will change the side of the screen they come in from after a pretty long while! This was a cool surprise.
i noticed that too. i was already rifting out when it happened. on one of my maps it gave me the idea to have creeper spores attack from all sides at once. when one side goes the next wave is 5 secs later and is the same except for a different side of the map