Loss of Lemmings: Zero
Click an Archer halfway along the pit, firing the arrow to a couple of pixels below the top of the obstacle on the right. Build right with the next Lemming as soon as it lands. The completed ramp should not touch the arrow. Jump one onto the arrow, let it walk all the way to the right and reflect, then Stomp the left edge of the sandstone cliff across the gap from the exit. Stop the stomper after 5 or 6 ``stomps'' by making it Build, and Jump off when the ramp is complete. Make it an Archer on the small mound just above the right edge of the steel, aiming 3/4 or more of the way up the slope. Let it reflect, then Glue right from the arrow. After gluing, it should walk up towards the exit level - Fence the sandstone, and Glue as soon as the fencer finishes. Let it reflect and come back, then Jump to the exit. Jump another one from the horde off the ramp, let it come round and reflect, and Glue from the top of the ramp to the exit. Start a Builder from the top of the ramp to release the horde.