It's Sudoku, with cats instead of numbers. The music has a nice loop, the cat designs are very cute (I want plushes), and the Sudoku is not exceptionally difficult but can provide some fun brain teasers. Also replacing numbers with cats makes it simultaneously easier and harder. There is a daily puzzle but I would pay for some DLC of new puzzles/cats too.
Honestly, for a few hours to kill and to try a new genre of games? yes. Do it. The puzzles followed well once you figured out what they were asking (never TOO Difficult) Hints helped out a lot if you didn't know where to go, and the story was tense in a great way. The seek and finds could be a bit hard to figure out, but the main thing is I couldn't figure out how to save. As it got late and I wanted to get to bed, but was near the end but no save system... yeah it was a problem. I don't know if the later games fixed that. I couldn't find an autosave or manual save. But besides that, fun seek and find!