9-4: Booby trap
Lemmings: 50
Save: 46
Time: 8:00
Release Rate: 50
Skills: 5 Climbers, 10 Floaters, 5 Bombers, 2 Blockers, 3 Builders, 3 Bashers, 3 Miners, 2 Diggers
Good: A race to hit the switch and release the crowd a weasel-induced massacre occurs. The switch on the way to the exit makes it so the crowd has to be reasonably bunched up, otherwise the stragglers will become weasel punching bags.
Bad: Wow, where do I start?
First of all, the process of hitting the switch is so simple it's almost trivial. This is by far the least interesting of the levels that have used this theme.
Next, the teleporter is glitched almost to the point of being game-breaking. It's designed so that the lemmings turn back toward the exit as they are exiting the teleporter; unfortunately, sometimes I've had multiple lemmings get sucked back into the teleporter going the other way, returning to the start where the weasels are waiting for them. This entire problem could have been eliminated by simply reversing the positions of the teleporter and exit, or even eliminating the teleporter altogether and just moving the exit down.
Third, it only takes two bridges to make a wall that holds back the weasels, which defeats the entire "quick as you can" concept.
Lastly, What is with the switches being in the form of those weird boxes? This is the only level in the game in which they appear, and they don't appear to serve any purpose that can't be fulfilled by switches or laser gates.