Great visuals and interface, and it can be kinda satisfying. But there are a lot of repetitive "filler" puzzles, and some puzzles that are very difficult but in a tedious way. Rather than having a moment of understanding something new, it boils down to 10+ minutes of trial-and-error.
And getting stuck on a mainline puzzle completely halts your progression, a design choice that most puzzle games have thankfully moved past.