What made the game unforgettable were the backstories and designs of all the ghosts in both this game and its sequel "Mishap 2: An Intentional Haunting". Both of them were the driving force that made me want to create a story revolving about ghosts.
I mostly played by myself since it was a single-player game, but I didn't mind at all. It would've felt a little weird if the game was multiplayer since it was a hidden-object game.
I think finding all the minor ghosts in each chapter enjoyable. The same goes for medalling each of the chapter's minigames. They were hard but enjoyable to me, including the card game. I actually played a real-life version of it with my mom a few times when I stumbled on it.
I would love to see it added to GOG for two reasons: First, I really enjoyed playing both it and its sequel. The ghosts being the major part about it. Secondly, it was originally available on Windows (which I mainly use) but not anymore. It is now only available on the MacGameStore but only for old OSes - which makes me kinda sad since my Macbook has an OS that cannot play it (and currently needs fixing). I hope this game will eventually be added to GOG because I want to relive my childhood playing that game.