Coarse 12 - Intended solution indeed.
Spiky 13 - Guess I overlooked that as one point the lemmings could be trapped with just a blocker...
Spiky 15 - Intended solution here too.
Spiky 16 - This is a workaround I overlook far too often. >_>
Sharp 2 - I definitely remember testing whether "your backroute" still worked and finding it didn't. Which probably means I was remembering it wrong while testing...
Sharp 6 - Easy oversight, easy fix.
Sharp 9 - Your solution is essentially the intended one, but you've overcomplicated the execution a bit. You in fact do
not need two lemmings to come out from the left entrance; one is enough. You then get a lemming for building the platform to the exit by releasing the lemmings from the right entrance at the correct time, which is much easier to achieve than what you did.
Sharp 12 - Still a backroute. Similar to Spiky 16, it's another case of me preventing a builder-platformer combo, only for it to be possible when the order is reversed.
Sharp 14 - It's not
quite the intended way. But at the same time, I am almost 100% sure it's impossible to block this while still allowing the intended solution (except with pickup skills arranged in such a way that the solution would be far too obvious), and it is very close.
Sharp 15 - This solution is fine, and also probably the closest to my solution yet. (In particular, I also used the midstroke-basher-bomber trick, although the level is possible without it.)