Fall and no life? (Taxing 20, GEN)

[Craig3410]

I'm having trouble with FANL1. (Level Taxing 20 on GEN) Ironic, considering the FANL2 is supposed to be much harder, and I beat that one.

What's the solution you guys used to get past it?

[Proxima]

*SPOILERS*

Build over the thin gaps with the second-last or third-last lemming so that exactly one lemming falls into the second thin gap while the bridge is being built. That lemming mines left to bring all the lemmings down to the bottom. The builder builds to the hanging platform at top-right and floats down to beat the one-way wall.