Pretty good all 'round
Unlike a previous asshole, I'm going to be constructive about pointing this out.
I went for the hand strength upgrade too and for a while thought I was stuck. There is a solution, there's a trick to how you place ladders on some levels.
And the game is pretty cool, except for the somewhat frustrating sticking point that obviously is difficult enough that a lot of players have struggled with it. I don't really see any way around it though without rewriting the entire game, so... maybe a brief tutorial suggesting the ladder placement strategies that some people are missing?
This is the first time I've played one of the games in this series and I think I'll be going back to try the first two when I've finished here.