If I can say something about this game it's that it was a total suprise: unexpected, with refreshing mechanics and marvelous execution. What seemed as a chill game about bloody slimes ended up being a heart-wrenching story with its fair share of plot twists.
You start as a slime getting out from a tank, with a misterious voice telling you something among the lines of "Hey, I'm kinda trapped in a tower, could you come and free me?". The rest, figuring out why the world is full of zombies, what happened to the previous civilisation or why are they experimenting on kids is up to you. However, you will be able to read the mind of the deceased, giving you clues and hints as to what happened in this god-forsaken place. And I mean ALL enemies. Absolutely every single enemy has a unique and different internal dialogue, where you'll be able to learn about the truth of the place and also about how was the person, sometimes about their relations... Realistic details that show you the enormous amount of effort that has been put into the game. You'll be as well able to get some memories, which may help you uncover the truth and story about your guide (whose memory is not the greatest). To top it, you will also get comic panels which will teach you about the different character's evolution and how did they end up like this.
Levels are different from each other. This is visible both in the graphics (which are stunning) and in the mechanics needed for surpassing the puzzles. The music is also wonderful and helps to each place feeling unique.
To advance you'll pretty much have to solve puzzles (as the fighting abilities of a slime are, well, those of a slime). These vary incredibly from area to area, so that you will never get bored. Rooms where you'll need to exhibit your abilities mix with rooms to where you'll have to improvise and use your problem-solving skills. However, they are not as complicated as to ruin the fast rythm.
However, as in any action game there are some bosses. The resolution of these fights is creative and funny, since you are a slime, and slimes usually cannot grab a gun and start shooting. They are very original and sometimes figuring out what you have to do is a challenge in itself. Other times, it's more of a matter of ability. I'd still like to hightlight how different these bossfights are from one another, always suprising you and again amazing you with their magnificient soundtracks and graphics.
So, about the artistic style (ost and graphics). The graphics are extremely detailed, and it is obvious someone put a lot of effort into creating them. The ost is magnificient and accompanies perfectly every moment of your formidable adventure.
There are also many difficulties, which you may adjust at every moment in the game. They also affect some puzzles, meaning the whole experience will change according to what you choose.
To sum up: MO: Astray is an amazing hidden gem that suprises not only for the incredible amount of love and effort that has been put into the game, but for it's heart-wrenching story and amazing gameplay. For how little it costs, it is a must for everyone looking for something different.