Ok, now I get what all the fuss is about.

For moments the repetitive puzzle approach bores me, and also at the same time, the dopamine does its work making me try to solve more and more... hey, some puzzles are not intuitive at all, still at the same time, the level design adds some limitations not to make it impossible and frustrating to solve.

In the end the drama and tension are so addictive that it makes it difficult to stop playing.