It's a trade off
Number of lemmings that drop: 20
50% to be saved
Release rate: 1
Available time: 03:00
Turn the first lemming into a floater and a climber. Let the second lemming dig down at the right of the entrance and set the release rate to 99. When the first lemming is near the last hole in the wall, mine down. Now mine down to the left and do the same near the entrance. When there's a gap, build to stop mining.
Last edit: Wednesday, 14 May 2008.
Main source: own words.
Graphics: Oh no! More Lemmings, Amiga platform.