I well remember how excited I was when I worked out the solution to that level!
Taxing 7 - Every lemming for himself!!!80 lemmings
Save 97% (78)
Release rate 55
3 minutes
1 climber, 5 bombers, 1 blocker, 6 builders, 1 basher
Good: A neat skill-efficiency puzzle at the start, and then (or at least it seemed this way at the time) ever such precision building to get over the gaps. A "Taxing" challenge indeed.
Bad: Why allow you to lose two lemmings? Did they have some other solution in mind, and if so, what?