Additionally, after playing through the game I felt the same way about it. Particularly the "post (meta?) game" puzzles. Perhaps some enjoyed solving those, but for me it was a tedious exercise that brought little satisfaction to the point that I ended up looking up most of them in walkthroughs.

Also, spoilers? In a game that does not have a story?

I'd love to hear which parts of my post you consider spoilers, since i only see "align --------- and trace them" and "walk ----------- and trace lines -----------" as possible spoilers, and puzzle-wise they're incredibly mundane.