I almost did level 7 on Tricky
I finally had it right without triggering the bug where he has to walk all the way back and get blocked and then find out he actually can walk on the stairs I just built.
I also finally had the height worked out on the last pillar so that they wouldn't fall down and die both times =\
But then I made them walk early before I was done digging because you run out on time easily

but they were too early so so and and then I blocked them but they walked back into a ladder I built that was so buggy they fell through it on the way back because the gap was only big enough to walk up and on the pillar but not back and then I cried.boohoo.