I find the puzzled very relaxing and enjoyable. The physics of the energy flow is interesting and beautiful. I love the fact that there are no timers or other encouragement to hurry, as well as the opportunity to play any level at any time, without having to solve all the earlier ones first. I also appreciate being able to silence the music.
A few puzzles (so far) seem overly finicky to be relaxing, but one can skip levels if it gets too frustrating. Also, this really drains the battery on my 5s; given all the processing the game is doing this is not surprising, but I am careful about when and how much I play.
rradarr about Breath of Light : Relaxing Puzzler