I have thoughts.
The main campaign is very fun! I like the roguelike aspects in theory, and the 3 required halls are entertaining without being ridiculously difficult. However, I'm really not a fan of the 100%ing experience.
Endless mode has a lot of solutions that, especially later on, feel unintuitive. The amount of runs that I had to do just praying that the RNG would allow me to anvil the remaining combinations I needed... Way too many. Specifically, it took me FIVE RUNS of grabbing nothing but dead ends and eyes just to get those two combined. I haven't gotten all of the colors, because that would just be more grinding.
TLDR: Good for the main story, and endless mode is fine early on, but unfun the longer you go. Overall though, a fun puzzle game!