Don't leave any lemmings 0 [-1]
Going their Separate Ways 11 [+1] [-1] (Is that allowed?)
OK, we have a winner. Right, here's a random idea from the spreadsheet, how about 8-builder levels? There are 7 of them from Orig and OhNo altogether. Let's start each level with 6 points each.
Here's the list:
If at first you don't succeed.. 6
Lemming Rhythms 6
Meeting Adjourned 6
POOR WEE CREATURES! 6
ROCKY VI 6
Scaling the Heights 6
This Corrosion 6