An Architect's Adventure

I'm less than half way through, but want to give a thumbs up because it is a really REALLY good puzzle game. Very parsimonious design, but develops a large number of fun puzzles from a few mechanics. Pretty much every puzzle stumps you for a bit... but not too long. You feel like you're getting better at this variant of spatial reasoning, not just flailing and trying out every combo, so that's pretty satisfying. It has a nice overworld meta-puzzle layer too, which motivates/rewards completing the harder puzzles. May append additional thoughts once I near the end.

Pure puzzle bliss. Great puzzles clustered into related themes based on simple mechanics whose surprising depth is fully explored. Delightful overworld puzzles add extra challenge. All the usual puzzle amenities like infinite undo and overworld fast travel, plus the optional simplified puzzle hint system that I associate with Can of Wormholes. This is a no frills puzzle game that doesn't bother with graphic presentation or storytelling, but if you're into the SSS-era of exquisitely tailored puzzle design centered around a-ha revelations, you've come to the right place.