Eon 1 - Be Attitude For Save One Nice level to start off the pack even if I got this one super quick. I love the part with bombing the second climber in order to make a turnaround point for the first one who needs to be interrupted with a builder after bashing and making a route to the exit.

Eon 2 - Trust Your Lucky Star? Not a hard level if not concerned with the talisman, but as mentioned it's super frustrating if going for it. A lot of the time the climber came at the wrong time and hence wouldn't be able to make it to the very top. Consider easing the talisman to make it less frustrating. It is a nice one though!

Eon 3 - I Am E.Z.T Nothing hard here other than you need to make sure you don't destroy all of the overhang on the far right edge, since that serves as a splatform for the Lemming trapped on the left side. It still took me longer than it should had. Not sure why it took me a while to figure it out

Eon 4 - Head Bang Bump Wash Dry Turn Blow Another one that I struggled with much longer than expected. Not sure why building to get over the teleporter from the right side took me a long time to figure out. This makes a big difference in that it allows the long basher to get to the receiver area in time to allow a neutral through after parking with a blocker and bombing to release one at the right time

Eon 5 - Four Shruggers Easy one just like Eon 1. The only hard part is the top Lemming using one builder only as delay, but it's not too hard to see after one spots catching the bottom climber with the middle Lemming by building and you see that attempting to build past the traps results in splatting after it's done. 

Neo 1 - One Hot Minute Wow, very nice talisman and one that took me a long time to figure out. It took a while for me to find a different way than having one climb to go on ahead before I succeeded. It really should had occurred to me that you will always fail the talisman if even one obstacle is climbed, but I didn't catch on apparently! As mentioned, the talisman solution is very well-hidden. Didn't think to use a digger to turn around instead of two bombers at the start. In this way, you will have all bombers to clear all the obstacles ahead so that no climbing is necessary, since it's impossible to achieve the talisman that way, even if you squeeze out the maximum potential in saving as much time as possible. Excellent talisman!

Neo 2 - So Many Spikes Somewhat hard and one in which you will always fail if you take the normal route of passing through the traps at the top, as all Lemmings get killed, even if you bomb the athlete to release the blocker so that he's compressed with the rest of the crowd and hence only 1 dies to each trap. It's not clear that a bomber is enough to not get anyone killed to the needles trap at the start. Nice solution with bombing close to the steel wall at the bottom so that the athlete is the one who goes to the exit!

Neo 3 - Eroded Ark Nice builderless level! These tend to be my favorite type of level in the game. Took me some time to see that the climber is the one who goes to the exit, not the floater. The floater simply prepares the route for the climber. Once you realize that, you have to figure out how to delay the others long enough to be able to send a climber at the right time but not so long that one of the diggers digs to the bottomless pit.

Neo 4 - Tower of Sacrifice Nice level by Icho here! Love the concept of the climbers needing to survive and go up the ramps to make turnaroud points by bombing. It can be a bit difficult to get the climbers to be first to get up the "tower of sacrifice" though. I'm guessing the floaters are for that purpose of making the timing easier, especially to release the Lemming trapped at the bottom by making him climb.

Neo 5 - The 6" Escape Plan Yea, sorry, this also made me rage. I really would suggest expanding and making more room available so that it isn't so tight on the execution. Remember, demanding precision to increase the difficulty is not a great way to do so, especially on an engine that emphasizes that the difficulty should come from the puzzle, not the execution It also wouldn't hurt to make some things more obvious that they wouldn't work, such as destroying the terrain before the exit being off by a few pixels and similarly with making it more obvious that the miner would fall past the exit at the top.   

One 1 - Umbrella Irony Irony indeed, as for some time I assigned the final floater to the wrong Lemming. That's simply due to me being so fixated on building on the far right with the second builder to turn around, when in fact you can just build on top of the green emerald in the middle of the level to do so. Doing this gets around the problem of the timing not working out in the middle of the level with the gap before the emerald. Excellent level!

One 2 - Aquarium Deception Wow, this is one of the most creative levels I've seen that involves the nuke! I should had picked up sooner that the nuke is involved due to the high Lemming count, combined with the very low save requirement, and how if you attempt to build over the gaps on both sides you'll always be a builder short. My only point of criticism here is that if my solution is intended, I would lower the terrain at the top so that it's clearer they won't walk out the top of the level and die. I'm not sure if the solution can be adapted to get to the exit from the right side instead.

One 3 - Clappy Clapple Backroute just like darkshoxx, though I haven't seen their solution yet. Mine's definitely one since I saved way more than 1 Lemming here

One 4 - Clues Do Easy one but only because I'm already aware of the double builder turnaround trick. Still, I like how every Lemming needs to keep moving forward in the level, especially as only the non-climber can make it to the exit. Well done!

One 5 - Blues Possibly the hardest level in the entire pack, I had a suspicion the nuke is involved here too. It just took me a while to figure out how to make it work, as it's way less obvious here than on One 2. Should had been clear due to always being a destructive skill short if taking some kind of normal route. All the cracks and everything in the level all seem to be due to backroute fixes and hence that kind of compromises the aesthetics of the level to an extent Even then, what do I know, as I haven't made that much levels in the Fire tileset yet. Nice solution but can be very hard to execute. That took me several tries before something finally worked, since I would be able to get the crowd to the exit but none would be able to exit since some explode to take away the terrain burying the trigger and hence the ones that stop on top of the exit trigger fall past it and therefore can't exit. The solution definitely reminds me of one of my levels for my upcoming Lemmings Memories pack, but as mentioned I'm not going to spoil which one it is You'll have to wait for me to release the pack first, if and when I ever do Even then, there's a possibility that people might have figured out which one if observant enough

One 6 - Bonus Level : The Blue Pi Nice level to finish the pack on but can still take several tries before something works as well. Here I managed to save a digger but should still be acceptable since it should only be possible to save just one Lemming. Looks like I'm not quite right in that it doesn't have to be the athlete that makes it to the exit. Any of the others can do too, as long as the floating block is used to get to it.     

RE: Your hint, still not sure which level it refers to, but it seems to me to imply an Oh Noer - that would refer to a blocker in a different state, i.e. in the process of exploding. If so, I suppose that must relate to The Lemming Ledger, but I can't see why that would be beneficial unless the explosion is also creating a path that was previously inaccessible.

This is a solution I haven't tried before for The Lemming Ledger. From very early on, I always thought that thin piece of steel half way up the cliff face must serve a purpose and I believed that purpose was for a miner to mine backwards towards therefore closing off any way back. Until now though, I couldn't see a way to put it into practice - the lemmings were too close together and once I started bashing, a couple would always pass by before the miner tunnel was deep enough. What I've done here is extremely fiddly and precise though, which leads me to believe it's still a backroute but hopefully closer to your intended solution.

When you said I was close a couple of attempts ago, I took that to mean that my initial move of blocking the builder and immediately digging him out so that two lemmings go in opposite directions is correct. That would also tie into the title of Reverse the Polarity! This time I did need the additional digger because if the miner had continued on his trajectory, he would have landed on the platform and therefore, the newly added trap.