I completed the 4th Level using 1 digger,1 basher,1 climber,1 floater n 1 builder.
s370pak1 - Level 5: Climber's Explosion
Number of Lemmings: 73
To be saved: 97%
Release Rate: 1
Time: 4 minutes
Skills: 2 climbers, 1 bomber,1 blocker, 5 builders, 1 basher ,1 miner
Good: Good scenery, uses a good amount of tools and is overall a cool level
Bad: Level not too hard, Also you can complete the level in just 2 minutes