Up, up, and away! is the ninth level of the Hail difficulty in Holiday Lemmings 1994.
Strategy[]
Make the second Lemming a Digger to trap the other Lemmings in a pit then have him build once the pit is deep enough. Meanwhile, your Trailblazer must build up to the wall where there is no steel. This should require a whopping ten Builder skills. Then bash to the exit, raise the release rate to 99 and have a Lemming held back build out of the Digger's pit.