Heh, I didn't notice that either.........
OK, here's my last contribution. I'm going to have to drop out now because Present 30 has so far proved to be way beyond my meagre solving skills. (Though if you could save "Exodus" for me......)
Present 28: Which one are you trying to get?
1 climber, 10 floaters, 2 bombers, 1 blocker, 4 builders, 3 bashers, 1 miner, 3 diggers
To save 100% of 30
Release rate 99
4 minutes
Good: an utterly manic level -- it's taken a long time but the Present levels have got difficult at last!
Bad: surely there must be scores of backroutes exploiting the falling directly in to the exit trick?
Typically, the solution I found was monstrously complex, and it did require the falling directly into the exit trick, but it hardly counts as a backroute, since I needed nearly all the skills.....
First lemming on left climbs, and digs the ledge on the other side of the ball. Build over the first gap (starting a bit back so that the last brick doesn't quite close the gap), bash through the middle ball, build under the platform on the right. Dig just left of the exit so that lemmings falling down the right edge of the dig pit will go straight in. Build against the spike to turn round into the exit.
Release the right lemmings by digging a couple of pixels with a left-facing lemming then bashing; the middle lemmings by mining to the right; the left lemmings by bashing right and making them all floaters. This solution requires all the skills except three floaters, the bombers and blocker.