Emerald Cave - Same solution as kaywhyn if I remember correctly. I fixed this one along with other backroutes that were found. Your comment about the intended solution is indeed spot on! Hopefully there won't be many backroutes left after my fixes.

Better Run for Shelter - Someone else also solved it that way (may have been kaywhyn here again). This backroute made me scratch my head to find a fix but an idea came to mind watching your replay. I could limit diggers so you couldn't use one on the stairs to make the worker turn around. 4 diggers total seem enough to solve the talisman. Will have to do some tests! I don't like to limit too many skills for talismans because it quickly becomes an ordeal to remember all requirements. But limiting only builders and diggers should be fine

The Strange Relics of Lemnos - You solved it as intented but I had to leave a comment anyway, well done!

Minimal Design - This one felt rather straightforward to me but seems to give players some trouble! I may change the talisman color from bronze to either silver or gold

Ancient Crash Site - Perfect! As usual in my levels, I try not to leave precise skill placements to chance. It's the case here for the builders, you can set them at places that are easy to remember, but I may be the only one to see it

Pagoda St. - This is actually the route I use in my solution. I like it

Standard Test Chamber - Amazingly, this is almost a carbon copy of my own replay! Except for the fact that you had to use a basher at some point to delay one of your workers. Very well done! I still have to fix backroutes here, not sure how to approach this. Also thinking about removing one of the cubes because the as Guigui implied, the companion cube is supposed to be unique right? Glad you liked the Portal theme

Voltaic Mosaics - Interesting reversed one miner solution here!

Clumps - You actually got a few elements of the intended solution here. Will have to think big time to fix this level. Removing walkers seems mandatory.

Iron Industry - Your solution is very efficient, I'm impressed! Too bad there aren't enough climbers to save this extra lemming. I will increase the climbers pickup amount to reward players that want to go the extra mile I had a great time making this level. It's very different from what I'm used to make.

Spring Break - 100% solution here again. This needs to become the new requirement for this talisman

Correct solutions
The Bad Beginning
We Are Lem-Bob-Omb!
Lemming Falls - You used the digger correctly, the rest is open-ended.
Lemstones - Well done, using the right side requires more precision.
Cloud-Covered Stalactites - It was like watching my own replay! This is the solution I'd like to enforce.
The Strange Relics of Lemnos - Finally, the intended way to solve this talisman! Well done!
It's a Kind Lembourhood
Minimal Design - Identical to my solution in every way.
The Italian Job
Pagoda St.
Standard Test Chamber - Digging the middle block to make a path for the climbers is what I intended! Glad to see a replay solving it this way
Voltaic Mocaics - Nice sneaky miner on the right side in your 100% solution You used so many builders!
What Happened in Sovogda?
Iron Industry - Great solution, virtually saving one extra lemming!
Spring Break - Coll 100% solution! May become the new standard for this level
Ancient Crash Site - Perfect solution! Yay

Backroutes
Emerald Cave - This is a bit embarrassing I mean it's not far from the intended solution but I didn't see it was possible to solve it in this more simple way.
Better Run for Shelter - Similar to JawaJuice's backroute, the same fix should prevent both.
Clumps - Nice builders wall! But yes, putting walkers was obviously a bad idea.

Alternative solutions
Training Day - Your solution it similar to Guigui's. Not what I intended but it feels legit.

Correct solutions
The Bad Beginning
Training Day - Your solution is what I intended
We Are Lem-Bob-Omb!
Lemming Falls - Spot on! You used the basher to delay the other worker the same way I do.
Lemstones - Nice use of the blocker to save a builder, making the bottom part easier.
Cloud-Covered Stalactites - Very similar to my own replay, only you used an extra basher
The Strange Relics of Lemnos - As for Icho: well done! This is the intended way.
It's a Kind Lembourhood
Minimal Design - Seems like unnecessary sacrifices, but your overall solution is good!
The Italian Job - No need for the miner canceling trick, but it's ok to use it.
Pagoda St.
Voltaic Mocaics - I tried to make the setting of the builders and miner easier but it may be too hidden to notice: you can use the horizontal notches on the pipe as landmarks. From the second bottom noch, set a bomber and build to the right. From the fourth top notch, set a bomber and mine.
What Happened in Sovogda? - This level is mostly open-ended, the falling bomber at the beginning is what I intended so it's nice to see it here!
Iron Industry
Spring Break
Ancient Crash Site - As for Icho's: perfect solution! Well done  

Backroutes
Emerald Cave - Same as Icho's solution! I will fix this.
Better Run for Shelter - You used the backroute I found a few days ago, and I don't really know how to prevent this. Will think about it!
Standard Test Chamber - You solved it exactly as JawaJuice and similarly to Guigui. Demands more precision than the intended solution but takes a shorter route, too.
Clumps - Walkers, walkers, walkers

Correct solutions
The Bad Beginning - Of course
We Are Lem-Bob-Omb!
Lemstones - You used the intended side.
Cloud-Covered Stalactites - Your solution is the same as JawaJuice's. Rewatching my replay, I noticed that I only use 5 bashers so I may tweak the talisman to require a more optimized (and elegant) route
It's a Kind Lembourhood
Minimal Design - Your second replay is correct! You can make it a bit easier by setting the three blockers right away at the beginning, as setting a blocker among packed lemmings is sometimes a nightmare
The Italian Job - Well done! There are ways to ensure lemmings won't splat, execution doesn't have to rely on luck here. You can take a look a JawaJuice's replay for a good example of this
Pagoda St.
Voltaic Mocaics - Your 100% solution was fun to watch
What Happened in Sovogda? - Different from my solution but still valid.
Iron Industry - Here I only wanted to make a fun puzzle, divided in several little steps. The pickups making the order obvious is not an issue to me

Backroutes
Emerald Cave - Clever, but not intended. Won't be too hard to fix I guess
Better Run for Shelter - Right side is correct, left side is not. Fixin JawaJuice's backroute should also fix this one.
The Strange Relics of Lemnos - Your talisman solution uses the whole layout so it's kind of right but this basher/blocker trick makes it messier than the intended route. It even makes it harder as the intended solution doesn't require such timing or precision. I may remove blockers from this level as they're not even useful for the vanilla solution. Or I could just add a requirement to the talisman.
Standard Test Chamber - Very nifty solution! Not intended, but I like it. Like JawaJuice's it required way more precision than the intended solution though.
Clumps - Yes. I will need to rethink about this level for sure! Even if your solution it really solid, it's very far from what I had in mind for this level.

Alternative solutions
Training Day - Interesting! I intended for all the lemmings to get to the left side exit. But you still used the basher correctly so I'd say your solution is valid too.

Glitched?
Lemming Falls - Not sure what's happening here but your replay only saves the worker, the other lemmings all splat. I also tried the replay from your previous attachment with the same result. What floating piece of grass are you referring to?

Not solved
Ancient Crash Site - I won't say much because I don't want to give unwanted spoilers, but a good part of your solution is correct.
Spring Break - Well done nevertheless. This ascending basher stairway is a work of art


And to answer a few of your remarks:

Lemming Falls

QuoteI love the water fall in this level, tricky design 

I was worried about the vertical water looking weird but it kind of works so it's nice


Standard Test Chamber

QuoteOne 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 !

Ah, as usual I got carried away with decorating this level and put another cube to the right side. Me and my symmetry obsession Removing the second cube would make sense. I thought about adding other Portal references but 1/ it's haaaaard and 2/ I didn't want to make the level too on the nose. Buuuuut anything may still change of course

QuoteHow does it compare to JawaJuice solution ?

I'd say it's similar in the general idea and trick used, but yours is cleaner, if I can say it that way. Not to dispraise their solution, of course!


What Happened in Sovogda?

QuoteWhy not set the depart screen to this moon and starting area, as you did in The Italian Job starting zoomed on the helicopter ?

I tried to set the start view as high as possible, keeping the floor visible. Making only the moon visible would be annoying as the played would have to scroll to reach the trapdoor. Speaking of this, I'm not sure what I did is optimal for all screen sizes. I only tested this on my laptop so it may vary for other users About vertical levels, I set their width so it would exactly fit on my screen without having to scroll to the sides but here again it may not work for all screen sizes.
Also, it's not a moon and the whole level is just a big reference.

Correct solutions
  The Bad Beginning - Well duuuuh
  Training Day
  We Are Lem-Bob-Omb!
  Cloud-Covered Stalactites - This is kind of an open-ended one. Gold is definitely not right for this one
  It's a Kind Lembourhood - Another open-ended one.
  The Italian Job - Also an open-ended challenge.
  Pagoda St. - Yet another open-ended one. My route is to go over the roof of the second pagoda, but anything goes.
  Voltaic Mocaics - Both talismans.
  What Happened in Sovogda? - You even saved an extra lemming! Using all these builders didn't even occur to me. I will edit the requirements.
  Iron Industry - You did a few things differently but overall it's very fine.
  Spring Break - Well here again you saved more than needed, 100% even! This needs to be the official solution for sure. Mine was similar but I used bombers to get to the exit.

Backroutes
  Emerald Cave - Will be easy to fix.
  Better Run for Shelter - This one will also be easy to fix I guess, but I found another backroute and I have no idea how to block this one.
  The Strange Relics of Lemnos - No idea what's going on here! Removing blockers from the equation will prevent this.
  Standard Test Chamber - I'm speechless
  Clumps - I'm not surprised about this one. Walkers make things haaaaaaard.

Alternative solutions
  Lemming Falls - I didn't intend this route at all but I like it a lot!
  Lemstones - Well done succeding with the right side of the level. The left side was intended but both work the same. Going right requires more precision as you need two builders to close the gap. That leaves only 2 builders to make the splatform.
  Minimal Design - You made it harder than it is! You can actually save 15/20 lemmings here. Setting the save requirement to 15 would prevent your solution and I'm not sure I want to do this.


Ancient Crash Site - Nice solution, making use of the decoration on the steel pieces. I'm glad it doesn't work though