The Strange Relics Of Lemnos had to be done the other way around, always hard to see but it solves both problems of where to put the bridge, and not having to cancel that basher.

Your Ancient Crash Site solution is a marvel. Save a bridge by making bridges in an unnatural way at the beginning. This level is on par with Armani's best tricky designs, reminds me a lot of Underroot in the last contest.

Also 100% on Spring Break looks easy when you watch Ico do it. For some reason, I'm just not that good at seeing how to use multiple miners.

Emerald Cave This one was hard to spot for me : after the builders we realize that we have 2 builders left to contain the crowd somewhere. I could do it in a precise spot at the right of the level, intended I guess ?

Lemming Falls I love the water fall in this level, tricky design 
I used the floating piece of grass to avoid the splat for the crowd, not sure if intended.

The Strange Relics of Lemnos Still dont know how to do it without cancelling the upper left basher in some mysterious way.

Minimal Design I guess I have the save 15 solution you mentionned earlier. Gotta make splatforms in an optimal way : one bridge to both avoid splat and go over the blocker previously set for turn around.
It did not take me long to figure it out because, luckily, I just played the Mobilems pack in which the level If a Lemming Falls uses a very similar technique. This level had me stuck for a week!

The Italian Job Execution was pain here : mine too early and lemmings may splat if they have not joined the crowd yet ; mine too late and you get a bunch of close lemmings some of which may fall from one pixel too high and splat.
There must be something I overlooked here to make the miner easier to set.

Standard Test Chamber Wow ! A tribute to Portal in a Lemmings level, great idea. The two best puzzle games ever in one, brilliant.

One remark though : two heart cubes ? There is only one of them in Portal 1 for sure, and tons of them in Portal 2. Breaking the unicity or the extreme multiplicity of those cubes here seems like a weird idea.
Also a suggestion : definitely put a tiny "The cake is a lie" or "The lem is a lie" text in some corner of the level !

Anyway, great level. For the resolution I came to the conclusion that one needs to first get to the middle part to push the button, then get to the upper part with the crowd to the exit. So in the meantime I had to fill the hole leading to the middle part. Was that the intended way ?
How does it compare to JawaJuice solution ?

Voltaic Mosaics Not that hard even with a single miner. I must apologize that my solutions here are a complete mess as I was improvising most of the time.

What Happened in Sovogda Love the design and the red moon. Why not set the depart screen to this moon and starting area, as you did in The Italian Job starting zoomed on the helicopter ?

Clumps I also have a save all and no destructive solution. Walkers are that strong.

Iron Industry Very nice level. Regular clear does not need any pickups at all, and talisman needs all of them. As often with pickups, I cannot decide if they make things harder or easier actually. I mean looking at the level you can quickly see in which order to go and pick them, and this kind of gives away the solution. Though if you were to give the skills readily available, then the level would fall apart. So yes, pickups are double edged.