Hi all,
I created a mod called Perus Puzzles soon after the game was released.
Since then, I've had some new puzzles under development, and now after a long break I'm finally getting to finish them. All the (three pretty large) puzzles are now done. Still have to do some testing to get rid of most of the bugs and loopholes.
The new set of puzzles will contain some of the same mechanics as the first one. They will be harder, too. Especially the last one I'd guess.
If nothing unexpected shows up, I'll be able to release it on Steam pretty soon.