This is a typical Splatt level is the second level of the KICKASS difficulty in New Year Lemmings 1991/92.
Strategy[]
The first Lemming will be your Trailblazer. Have the second dig into one of the circles in the starting triangle to save 100%, or just use Blockers. Use three Builders to get over the bubble pool. Build again under both Vacuum Tube Traps, then three more times to reach the other high platform. Dig into the right vertical pipe. When between a third and halfway through, bash or mine to stop and complete the path to the Exit portal. Make sure the herd is freed with over a minute left.