Hard, great progression, great tutorialization.
I had to replay the first few levels over a period of a few days to really nail down the mechanics to avoid frustration, but it was worth it.
This is the first game since Gate’s Give Up the Ghost that I was fairly, yet severely challenged to figure out all the new mechanics.
Noa, the user who made this puzzle set also made a one-room brain teaser for the confounding calendar called “>” that is also worth checking out.