Nepster - All The Nines

IchoTolot - Lonely Drowning In Blood

Flopsy - Tell me the way to DMA

Mobius - Terminal Velocity

Mobius - The Copenhagen Interpretation

Gronkling - Zig-Zag Catacomb

Edit: Forgot attachment

The only argument against unlock all is the sense of progression you get from unlocking the next level - and i guess that is also part of the argument here for the secret levels being unlocked from talismans. For me, i am a huge fan of unlock all (and don't see why this logic shouldn't apply to the "secret levels" as well - I want to be able to play what looks interesting, possibly out of order if i get stuck). I think you could achieve the same feel of progression by having the option of specifying 3 versions of each ranking sign:
1) Default rank sign
2) Version of the rank sign with all levels completed (E.g. you could add a badge or write 100% or change the color or something)
3) Version of the rank sign with all levels complete & all talismans achieved

That way you have visible progression on the main menu, without having progression gate access to content. A "Percentage Completion" appearing somewhere would be nice touch too. Though i do admit i am straying a bit from the original goal of this topic, I think it is kind of a related issue. I don't think secrets should be locked away (because i don't like finding out i have missed out on cool content), but they could always go into a bonus rank which sits as the last rank, which you can complete at your leisure and will count towards your completion scores.

In the below picture, the 1px deep floor under the miner is considered one way floor pointing to the left.
If the lemming mines facing to the right on this surface, he will fall through (without destroying the terrain), rather than turning around.



Video

Replay for Lemmings Plus I (Wimpy 19) is attached too.

It might be because of windows trying to be "helpful" with its security. Whenever I download a new NL version on windows 10 "Windows Smartscreen" helpfully reminds me that it is an unrecognised app that has an unknown publisher, and i have to tell it to "run anyway". You could try checking your smartscreen settings to see if it is blocking the program - which is possible if you are not running on an administrator account.

As a heads up, since you mentioned you are looking at playing neolemmix on your streams, OBS doesn't capture the cursor correctly for me in neolemmix (it ends up as a garbled mess):


The solution I found that worked for me was to capture the window using either FFSource (which you get if you download the FFSplit streaming program, you can still stream using OBS - you just need to download the standalone so you can run FFSource and use it as video capture device in obs 32bit) *or* to capture using SCFH DSF (though this is less user friendly to set up) - you will need to capture the monitor region this way as "game" capture doesn't work for NL.

Looks like the experimental version has fixed the issue

Status: Fixed for the next update. For those who want a fix ASAP, the latest experimental version should be stable enough for general use, and contains the fix for this.

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Some window elements (most notably the terrain selection window & the shift level window) use the centre of the screen as their default placement, rather than the centre of the editor window / relative positioning with respect to the editor window. As a result, on a 2-monitor setup these windows always appear straddling the two screens, and you have to move them every time before trying to use them.

Below is a list of windows that have this behaviour:
File->New Level
Edit->Insert Terrain
Edit->Insert Object
Edit->Shift Level
Tools->Validate Level
Tools->Dat File Decompression

This is really interesting and looking forward to seeing where this goes - I hope you get to the bottom of the frame loss with objects & scrolling, i like reading about the technical stuff like that which goes into a tas.