Okay, yeah, the puzzles are 'clever,' but all of the challenge arises from simply gaining knowledge of what to do. There is pretty much zero replay value as a result, you merely look at the situation, good around, and then notice a pattern. The times it was challenging, it wasn't as if though it was challenging for any kind of a good reason. It was more like 'oh, I didn't see that object, but now that I do, puzzle solved.'
Imagine if you needed five pieces to complete something you were working on, and the background was black. Four of the pieces were white, one of them was black. You didn't know that you needed five pieces until you realized that four just isn't working out any way you slice it. So you look around top to bottom and notice, by golly, there be a black piece I done missed! With that in mind, there is no more puzzle, merely something that you overlooked.
Maybe I'm goal oriented, but in the package it's presented, it's very hard for me to take the puzzles as an ends within a means. I do like puzzle games, so don't start that shit. I can play bust-a-move, tetris, and the like all day. However, this seems to be a boring series of 'oh well gee, if I had only known' moments. Hell, that seems to be the guys fucking point with this thing, how things change with experience. The issue is that this is a very boring 'lesson' after the first five times it happens.