Well, I just had a go at your levels, Weirdybeardy. I finshed 3/5. Not bad. Unfortunately I just cannot figure out Riddle Me This even if I tried it for hours...
There is not enough skills for Innit To Winnit to free the lemmings before the left digging pillar. Your other levels werent bad.
I liked Path Of Least Resistance. Nice use of the builders there
All Lemmed Out was surprisingly easy, and I beat it on the 2nd go with only 2 skills used
Alas, Poor Lemming was quite funny actually, only having to save 1%, very entertaining watching the other poor lemmings blow themselves to bits!
3/5 is not bad for a first go at level making. Good job, Weirdybeardy