Almost everything you see in the video is not what it actually seems.

I created a special tileset(currently named armani_special - to be changed) that will be used in certain special levels of this pack, like this one. There will likely be one special level every 2 or 3 tribes depending how often my creativity sparks. By special levels, I mean they play out very differently from the usual guide enough Lemmings to the exit style of gameplay. Here's a sneak peek of an example special level that I previously shared on Discord:

Spoiler

(it's a GIF, click it if it doesn't auto play)
you have to survive long enough for the big laser gun to shoot down the boss, after which the exit will appear along with a victory message in the center of the screen

The tileset is packed with objects featuring deceptive sprites and animations; teleporter objects that use the bomber animation, as well as terrain hallucinations, walking Lemmings, gliding Lemmings and even some icons and UIs. I also made single-use trap objects with the sprites, sounds, and animations of various Lemming actions, which switch to another deceptive sprite once triggered.

The video doesn't show the ugly part of the level where the things actually happen; where it counts how many targets you've shot and triggers the hidden script. Once you see the full map, it'll be easier to grasp how it all works.