For Every Lemming, Turn, Turn... is the 2nd level of the Fun difficulty from the demo disk included with the Lemmings: The Official Companion strategy guide book.
Strategy[]
Though only the second level of Fun, this level has a solution similar to the first major road block for many players of Lemmings: Postcard from Lemmingland. Set a blocker to the left of the Entrance Portal, and send a climber up the wall. Before reaching the Exit Portal, your Trailblazer should dig briefly then build to turn around. After that, mine to create a ramp for the rest of them.