Yeah, I need to update my Lemmini. I haven't launched it in years. I kinda transitioned to making NeoLemmix Levels exclusively since I like it's engine and features more. It was getting kinda hard to maintain two versions, and most people seem to prefer NeoLemmix. That's why there's only NeoLemmix for Volume 2.
However, I might release Lemmini versions in the future. I was working on Zemmings Volume 3, and kinda got pulled away from the project due to life stuff. My plans were to include all the levels in volume 1 and 2, plus the one-off contest levels I did, plus this special pack I did for Lemmini, plus a bunch of new levels, plus a new crazy tileset. Maybe now's a good time to get myself working on it again.
I can't make any promises, but I'll message you if I can find some time to convert Volume 2 to Lemmini.