It's very different from the other three Hidden Art games. I like them all and this one is refreshingly different. I like that there are several options for level of difficulty. I started the free trial and purchased as soon as the trial expired. I was enjoying it so much that I didn't realize another two hours had passed. There isn't anything so far to dislike. I recommend this game.
I really enjoy everything EXCEPT there is no way to exit the game when I wish to do so. Even using Ctrl+Alt+Delete doesn't work. The only way I have found is to turn the computer off. Not happy shutting it down without being able to exit correctly. This one factor makes me regret buying an otherwise very enjoyable game.