You could also play Deceits Lemmings which is a small pack of 54 levels only. I'd like to see if you can beat the infamous final level "Enter at your own risk." ;-) I couldn't so this pack can not be considered "solved" by me.

While this may be true, I think that the entire pack proves to be quite tricky so far. Much harder than Arty's other pack, SubLems, in my opinion. Thanks for watching, Eric.

Hey, having finished PimoLems today, I want to start ArtLems next - as I announced before. There was a bit of confusion in this thread if all the levels within this pack are solvable in the latest version of Neolemmix. Can someone confirm this? Thanks.

Yeah, I finished "One"today. And what can I say - there are some great levels in this rank. I especially enjoyed One 16 ("For Crystal Sake"). This level is absolutely AWESOME and probably a hard nut to crack for someone who is not familiar with the initial trick. I'm also quite sure that it is backroute-safe which cannot bei said for most of the levels here. Other levels I really enjoyed were One 12 ("I See Led People", also a great title), One 18 ("Lines & Curves") and One 20 ("There's Rashness in the Method").

https://www.youtube.com/user/Vidusaka

No, it wasn't just the time limit. I guess I'm just not used to trap a crowd between two blockers anymore This happens so rarely...

That's really funny. I'm stuck in the same level at the moment.  This level looks almost exactly the same as "The Brick" of MazuLems (that also has a time limit). Which I solved already, so I looked into my old video to find an approach. But unfortunately, the solutions seems to be an entirely different one. But I'm working on it.

For me, the replays are also actually the best way to "collect" all my solved levels into one entity. The green checkmarks within the game don't work for me since there are always new versions of the game.

To continue the discussion from Davids level pack here:

I didn't create a complete pack by myself, but what I realize is that every creator deals differently with this subject. Some are eager to eliminate every trace of a backroute while others can live with them quite well and consider them legitimate alternative solutions. Namida for example, who has multiple packs, provides updates for his recent pack only (at least I understood him like that) So when you play an older pack of him and find a backroute, it will most likely been left in.

As a player, I don't mind backrouting at all. For me, it's often more fun than finding the intended solution. I ALWAYS compare my solutions to those of others (via youtube, if possible of course). This means there is no appeal for me to play a pack again when it's patched.

When you have remaining skills in the end then it's actually always a backroute. Most level-creators don't provide red-herring-skills - since they often open backroutes. I backrouted this level (Broad Pit) too  - but I had only a basher and a floater left. Icho has youtube-videos of every level with the intended solution - so you can compare.