There I was, happily playing along in wave 87 (The fact that the Snow towers stacked additively meant that given enough snow, any blob will start moving in the opposite direction. That sure helped.), when I am abruptly given a game over screen, still with 20 life remaining. Did I hit a limit on the number of blobs allowed on screen/ Is there some other loss condition or end game condition that I missed? Will I ever see a MOB (or possibly is it that I already did, it was just killed nigh instantly?)
The Snow towers weren't meant to make the Blobs go in the opposite direction, that's a bug. There'll be a new update to fix that in a few days with other fixes and stuff.
I tried recreating what happened to you on the developer version and having too many Blobs on screen that have a negative speed value causes the game to crash, which caused the game over.
The MOB (supposed to be M.A.B) is glitched and doesn't spawn.
There'll be an update in a few days to fix stuff.