Blimey u chose a tough route Chris. My way:
Let two lemmings out, but set the second one to block just after he's landed on the lowest level of the ground. (this way all other 98 lemmings will bunch up into a tiny group which will save u valuable time on this level).
With the first lemming, as he nears the first tower, tell him to mine (diagonal down pickaxe one), then after about 3 or 4 hits, tell him to Bash (sideways mole like action).
He'll then dig his way all the way along to the large gap where u need to build the bridge. Get him building once he breaks through from his 'Bashing'.
Now comes the bit that involves some timing. Once your halfway across the gap (2 or 3 bridge building attempts) tell the blocker at the start to explode.
If u time it right u bridge building should finish the second smaller bridge as the 98 packed in lemmings are crossing the first.
Doing it this way i saved 99 lemmings with 10 seconds to spare
(and got a cuppa in while my mole man did his thing)
LSLO#8
