You're indeed correct that you can swap the jumper and climber and it would still work. Indeed, my solution sends the first two lemmings out from the top as climbers to the right to prepare the path for everyone but is otherwise the same solution. In addition, by using a jumper to get past the block and the trap, you have some more leeway on the bomber placement

However, your solution is fine. Needless to say, it seems that I've gotten into the realm of accepting slight variations for my levels with this contest

Here, nothing too hard other than there's a lot of moving parts, but even with that it's still nothing. You're probably also starting to see some elements of your and Icho's designs in here with keeping the crowd moving instead of containing them. This is just the simplest of this level design with this element I've managed to come up with
