Gregory's Server@Screwtapello fun enough that it's been my go-to minigame for a few years - taking over from democracy tetris (I mean, "EmojiTetra" (played on twitter, with one move per 20 minutes, as voted by people watching the game). I was actually about done with it when they introduced the level editor, and that's breathed a bit more life into it for me. The bugs that means I can't see all the levels I've made, is pretty suck though.
visually, it does have themed lemmings for variety, and has included at one point a replica of the original pixel lemmings as the default animation.
This is a good doco (shared by the game studio that did the current mobile game) about the game from a few years ago, covering the history of the game pretty well, and including a look at the way the mobile version works (last 15 min for that bit, but the whole thing is worth watching)
@nemothorx I'll take a look, thanks!