True yeah, I think for me it's the munchers. The speed, boo rings, scuttlebugs, having to stay airborne, and block design are already a lot to manage, but on top of that having munchers makes it way too easy to die way before big boo with how easy they are to graze trying to avoid everything else.
I cant count how many times i bounced on a scuttlebug and slammed into a muncher, the scrolling screen wall, or a boo (because someone had the insane idea to have it in the center of the boos) The worst thing that happened to me was i made it to the rain but the water rose trapping me in the narrow corridor with 3 boo buddy rings and big boo directly in the path. I had no choice but to run right into it all. 3500-3600. The tileset was too long to become the big open space at the end in tim