I had a go on your "Life as a Worm" level; nice level, has me stumped. My only possible idea is (unless it was meant for
NeoLemmix, in which case it's very trivial to solve there due to stricter terrain checks on climbers)...
That the solution involves that trick where a climber repeatedly tries to climb the edge of a basher's tunnel.
However, I can't actually seem to set that up in this level.
In case it matters: What mechanics did you use for this? I've been playing under CustLemm mechanics, should I be using Orig or OhNo instead? (Not that I can see any reason it'd make a difference on this level.)
EDIT: I've tried some more, and still no luck. I can come up with a hundred different ways to save 66%, but none to save 100%. I've never been the best at *solving* levels, but yeah... this is definitely a really good challenge!