MLY isn't so much a game as it's an interactive story, like a Choose Your Own Adventure book. That doesn't mean it's bad, but if you're looking for frenetic gameplay, you won't find it here. Instead, everything in this game hinges on your decisions and how you live your life as a monster.
If I had to compare MLY to a video game, the closest thing would be a very, very old game called Alter Ego (from 1986, not the 2010 game of the same name). The similarities are striking, with the exception that in MLY you play a monster in a fictional world whereas in AE you were a male or female human in the real world.
Although MLY's interface is better than AE's, it lacks the same depth. In AE, you didn't just make decisions and get older, but you could get an education, hold down a job, get married, get pregnant (if you were female), die prematurely, and so on.
I wish MLY had included something like those options as it would've increased the replay value a lot. That said, it's still an entertaining and unusual experienceand, so if you get it on sale (which I did) then you'll get your money's worth.