Welcome, brookstermax! Good to have you on the Forums.
I also grew up with the A500+ Cartoon Classics pack, I'm very familiar with it. My Amiga emulator has copies of
Captain Planet And The Planeteers and
The Simpsons: Bart Vs. The Space Mutants (and, of course,
Lemmings), which I still occasionally play to this day
It is my aim to play and own all versions of Lemmings (including the real hardware)
This is an impressive goal! Have you got a list somewhere of the ports you've played so far?
More recently I started putting content on Youtube about Lemmings, including an emulated play of the Warp OS/2 demo version today
Just had a quick look at this. I'm not familiar with OS/2, but this is a really nice-looking port! The interface is quite special, the developers obviously spent a lot of time getting it to look how they wanted it to.
I also had a quick watch of the ZX Spectrum version. The interesting thing here is that, due to the graphical limitations of the platform, each of the level styles is in its own single-colour, for ease of recognition. And you're right, it's very technically impressive that
Lemmings even made it onto the Spectrum at all.