Lemmings Plus I - MildThose marked with (R) were interesting enough to attach a replay for.
1 "Just Walk" - 0 skills
2 "Be Careful..." - 1 skill
3 "Heading On In" - 1 skill
4 "In The Style Of..." - 1 skill
5 "The Graveyard" - 2 skills (R)
6 "The Cells" - 2 skills
7 "The Staircase" - 4 skills
8 "Wish You Had Them?" - 1 skill (R)
9 "Tricky Hit" - 1 skill
10 "Take Your Time..." - 10 skills
11 "Cliff Climber Lemming" - 5 skills
12 "On The Pier" - 3 skills (R)
13 "Take A Shortcut!" - 4 skills
14 "Let's Go" - 6 skills (R)
15 "On The Other Side" - 2 skills (R)
16 "Farewell, My Lemming" - 6 skills
17 "Crying Over Spilt Lemming" - 2 skills (R)
18 "Dying Not Recommended" - 2 skills
19 "Up To Where We Go" - 7 skills (R)
20 "Stairway To Infinity" - 6 skills
21 "Falling Away From Everything..." - 7 skills (use the repeat's solution)
22 "Blow Down!" - 6 skills
23 "Step Softly" - 5 skills
24 "With A Little Creativity..." - 2 skills (R)
25 "Across The Ditch" - 4 skills
26 "No Salvation I" - 4 skills (R)
27 "The Quarantine" - 4 skills (R)
28 "The Descending Pillar Scenario" - 3 skills (R)
29 "We All Die Someday" - 9 skills (R)
30 "You Just Lost The Game!" - 5 skills (R)
Of these, the only one I suspect might be improvable is 29 - though please do prove me wrong.