@Lemsteven Aww, I wanted to review 12-5, but well, that's my fault for being too slow, as well as not speaking up about that. There is something I wanted to add, and that is IMO I probably consider it the best level in the entire game, especially as it uses something very unique, where the enemy that is usually very well-known for killing the Lemmings can actually be super helpful. Other than that, I agree with every point you brought up in your review of the level.
@mobius Not sure what you mean in the spoiler, as the fall apparently is not survivable even though it looks like it's kind of borderline of survival and splatting. Unless you mean the glitch of saving a bomber?
I've never had a weasel be set free and not die from the shredders but that seems like a remote possibility.
It simply kills the weasel (see my LP). Essentially, think of them as the equivalent of zombies in NL, where they're moving traps and subject to the same dying to traps like Lemmings, although I guess technically they're more like classic zombies than non-classic, since they can interact with objects (laser gates, levers, etc), while the latter cannot. In addition, another difference is that weasels are always permanent floaters.
Also meant to review this level yesterday and hence make it three levels in a row reviewed, but that went over my head
12-7: The Long and Winding Road
Lemmings: 20
Save: 5
Time: 5 minutes
Release Rate: 10
Skills: 10 of everything
Good: Looks long and difficult for a level where you're free to solve it any way you like due to being an X-of-everything. However,
Bad: Assuming that you're supposed to take a long way, you actually don't need to, as it's possible to shortcut and brute force your way into the exit area just by going a little bit to the right of the starting platform before building to the left and hacking your way into the wall to get to the balloon. Even if the solution in my LP didn't work, you could always float a worker down and simply build your way up so that you're lower and don't have to worry about bashing/mining into steel when destroying the wall before the exit. So much for the "long and winding road" indeed

As such, I have no idea what the intended solution is supposed to be, but from the looks of the level, it likely involves the gravity pads. Also supposedly the intended way is going to be much harder to pull off, although you have 10 of every skill, so probably not.
Halfway through the 12th and final column of levels now!