Thanks for playing. Several people have brought up the MMB issue. I've updated it with a keyboard binding.
The game has a lower amount of early puzzles currently since I want people to get to the 3d parts quickly. I will make the initial level flow smoother in the future.
I'm still working on the visuals and plan on changing the fold blocker visuals in the future.
That puzzle is also one of my favorite. Glad to know you enjoyed it.