MegSEBytes 1 -
Collaboration Station Nice and easy level to start off the rank!

MegSEBytes 2 -
Target Training Course Another very easy level. I especially love the design here. These first two levels are definitely reminiscent of the Paradise rank with being X-of-everything levels. The buttons in this tileset look cool.
MegSEBytes 3 -
Stay BUBBLY From this point on, it's pretty much several X-of-everything in a very wide landscape. So really it's just enduring long and complicated layouts. Still easy, though.
MegSEBytes 4 -
Brothers in Arms Now we're up to the maximum amount that we were given for the skills in some Paradise levels. Just like the Paradise rank, these levels aren't complete pushovers. Great variety here. This is another one where I really like the design. I say the hardest part would be getting through the maze with the steel blocks as the outside. I especially love the large variety of obstacles that can be gotten past, and the result is a very interesting puzzle. Nice job, Flopsy and Wafflem!

MegSEBytes 5 -
Into the Woods I remember this level being challenging in the MegSEBytes pack. Then again, it was the final level of the first rank there, so it was expected to be challenging. Even more so due to how I hate the weasel trap is quite difficult to see in that pack. Here, it's very easy due to the secondary animations. Were they recently added? Nice challenging puzzle that's not quite a true X-of-everything level. I like how the right side needs to help out the left side by collecting the swimmer pickups so that they can go through the waterfall. That's quite genius!

MegSEBytes 6 -
Scrambled Lemmings Now we're on the second rank of the MegSEBytes pack. This would be the first level of the second rank IIRC. Easy level to start off that rank, but it's still an easy level. All that's needed is to isolate a worker swimmer lemming to do the work.
MegSEBytes 7 -
Never Let Me Down Quite a challenging X-of-everything level. This level does a really great job in teaching the lesson of conserving your skills whenever possible. In particular, conserving your constructive skills is very important here, but the same goes with the destructive skills.
MegSEBytes 8 -
Mummies Alive! Much easier than the previous level. I really like this one!

Very nice solution.
MegSEBytes 9 -
Groovejet Hangar I believe this is the penultimate level of the second rank of the MegSEBytes pack. Though somewhat bare, I still love the design here. I remember this level being a bit challenging, but it's still not too hard. Nice puzzle where you need to get a lemming from the left hatch to come rescue the hatches on the right.
MegSEBytes 10 -
Come With Us Once I saw this level, I'm sure I remember this being the final level of the second rank of the MegSEBytes pack. Despite being an X-of-everything level, this is not trivial at all. It's a challenging level. I especially love how the tileset has an extremely great mix of colors. I say the most difficult thing about this level is being able to get to all the buttons while making sure you have enough skills to complete the level. Figuring out how to do so is not easy at all.
MegSEBytes 11 -
The Outbreak As you told me over the summer, this was probably the only level in the pack to break due to the changed glider physics. Indeed, Icho reported this level breaking when he saw that his replay didn't work. Nice puzzle using the preplaced lemming as the worker to do the entire level for the crowd. The only difficult part is the middle with the castle, especially with getting to the updrafts in the sky near the top.
MegSEBytes 12 -
SEBpphires I remember this one being difficult in the Old Formats version. Now that we're in the third rank of the MegSEBytes pack, the pack's definitely done playing around now. Here, we're probably around the Stormy rank of SEB Lems in terms of difficulty. The hardest part is definitely the right side of the level after collecting the pickup. Nice challenging puzzle with lots of good red herrings here with where to use the platformers.
MegSEBytes 13 -
Running Circles Around The Moon I say somewhat easier than the previous level, made harder due to being a huge level with three entrances, two of which will head into danger if nothing is done. I don't remember if this is how I solved the Old Formats version, but I think it's more or less that solution, since I definitely remember using a timing heavy solution here, especially with the two builders at the end by doing it at a time when I didn't have any lemmings nearby to drop off and go splat.
MegSEBytes 14 -
A Pirate's Life For Me I definitely remember being stuck on this level for a very long time in the Old Formats version. Indeed, that's exactly what happened here in the New Formats version as well. The strict timer here adds to the challenge even more. I'm guessing it's not really to block any backroute but rather to prevent taking all the time in the world to solve the level. Then again, this is the final level of the third rank of the MegSEBytes pack, so it's definitely supposed to be hard. I say we're now around the Revolution rank or possibly even Murder rank here.
This was one of the levels where I was trying so hard to remember how I solved it in the Old Formats version. This is also another level where the solution came to me after I had gone to bed for the night. Definitely not the same solution as the Old Formats one, since I definitely remember relying on a very timing heavy solution and digging to get to the first button to the left of the entrance. Indeed, my solutions are different, as I decided to showcase my Old Formats solution, which fortunately works here. In any case, I like my New Formats solution better, and it's also the same as Icho's. It's not as tight on time either.
MegSEBytes 15 -
Lights, Camera, Action! This was another level I remember struggling with in the MegSEBytes pack. I believe this is the first level of the 4th rank in that pack. Probably now around the Murder rank. I ended up assigning a blocker to the basher midstroke. Due to where it's standing, the climbers will be able to get past it. I really love how there's an actual camera in the level. Great design here. I checked my Old Formats solution after solving, and I used a far cleaner and easier solution. Too bad it doesn't work in the New Formats version for some reason.
MegSEBytes 16 -
Lemsels in Distress Very nice level here in terms of the puzzle. It's somewhat challenging, but it's not too difficult. It's amusing how I made the incorrect assumption that lemmings couldn't step out to the right where the OWW is where the green moss is. The problem here is that I didn't even notice it, hence why I kept trying to see if I could save a skill somewhere. Also the amusing climber falls back into the water thing. I already showed that to namida, and he says it's not a bug, which I agree with.
MegSEBytes 17 -
Digital Ice Age As mentioned outside the spoiler, this is one of the few levels that is different from the Old Formats version. Other than the higher save requirement, I believe the skillset is a bit different as well. There are also OWAs on the green bottle. I definitely remember struggling with this one. Then again, it is the first level of the final rank of the MegSEBytes pack. Here, we're either late Murder or even early Rapture. I ended up with a climber and bomber leftover.
My Old Formats replay apparently fails here as well. I'm not sure why, although I think it's once again an incompatibility issue between Old Formats and New Formats. I also remember in the Old Formats version where lemmings don't immediately exit if they use the teleporter going to the right. Here, lemmings are able to exit regardless of which direction they come out of the receiver. Maybe because the exit was shifted a bit here? Or maybe it has a larger trigger area?
MegSEBytes 18 -
Can You Hear Me? One of the two levels exclusive to the New Formats version of SEB Lems. This is definitely not an easy level regardless of the solution you do, but then again perhaps the reason I had problems was how I went for a 100% solution. Indeed, you kind of told me that the two MegSEBytes levels found only in the New Formats version are difficult. Also, I'm not sure if it's supposed to happen, but when the climber was climbing at the top I thought he was going to die due to going off the top of the level. Is there a tiny piece of terrain or something? If there isn't, it's probably a bug. I did turn on CPM to see if I could see some light gray there, but all I see is the level border brown.
MegSEBytes 19 -
Circuit Breakers Definitely another level I remember struggling with in the Old Formats version. Indeed, that's what happened here as well. I don't remember if it was due to how I didn't realize that there's solid terrain at the top where the teleporter is in the Old Formats version. I must had been aware that it was solid between the steel blocks up there. When I was working on this level off-camera, it was kind of an oopsie in that I accidentally activated CPM and saw a light shade of grey up there. That's what I get for thinking I knew everything that is to know about the tileset. Then again, can you really blame me for not realizing it? From what I remember, there hasn't really been any level in the tileset where you interact with that terrain piece via destructive skills. Not to mention that it's very different from the usual green/turquoise pieces, and not helped by the fact that it has a black border around it. I had to check the Old Formats version to make sure it wasn't an issue with the changed glider physics.
I tried showcasing my Old Formats solution as well, but the replays also fails here. Indeed, I checked not too long ago, and it turns out there are some other differences besides the OWAs at the top where the receiver is. The middle platform is also shorter so that it's not possible to glide on there from the OWW. My Old Formats solution has me doing that, and as a result I had a miner leftover. Here, I'm sure it's not possible to solve without using all skills.
MegSEBytes 20 -
Spaced Out The second level exclusive to the New Formats version of the SEB Lems pack. No relying on any of my replays for this here! Of course, doesn't matter, since I eventually figured it out. The third level in the rank to require more than one video to solve. In the end, I used quite a timing heavy solution in order to be able to have no one besides the climbers slip past the stacker at the top. Here, I needed to find the right timing to do the stacks so that one lemming was far enough ahead to be able to have enough time to make a full stack. I definitely felt uneasy about using a stacker and a platformer to collect the stacker pickups in midair, since a builder is the most efficient without wasting a lot of skills. I still liked the level and puzzle, though. Especially with a great music track on top of it!

As I suspected, there is indeed a much cleaner and easier solution that doesn't involve all of the crowd walking aimlessly about at the top. I watched Icho's solution after solving this level, and I definitely like his solution way better compared to mine. It simply never occurred to me to trap everyone at the bottom. Not to mention that I wasn't able to figure out how to get them out with the tools provided.