Righty-o then, level 4...
twpak11 - Level 4: Insane in the lembrain
Number of lemmings:80
To be Saved:95%
Time: 3 minutes
RR: 50
Skills: 4 blockers, 15 builders, 10 miners
Good: Nice use of the scenery for the main attraction, a relatively challenging level which is fun to solve and has many routes to it. The time limit is just right, not too strict, but it's tight enough to urge you on.
Bad: It's much easier then the levels before it, the save percentage could be higher for more challenge, and the skills supply could be a bit more limited.