Oh my god, words genuinely cannot describe how amazing this game really is. There is so much to say that it's overwhelming thinking about it all, but I'll try to put it into words.
The very first thing that stood out to me when I first played Omori was definitely the art style. It has this cartoonish-childlike drawing aesthetic to it that I just absolutely adore and appreciate so much, it certainly lures you in with a false sense of security and makes you think that the whole game is just as cute and innocent, with that not really being the case. Another thing that I really appreciate with the art is how everything has this sort of twitchy look to it, with that being done by simply just redrawing the image over and over again and then putting them together in an animation. Yes I know, very basic straightforward things, but I don't care I appreciate it.
The combat in the game is just your average turn based combat, except for one new feature, with that being the juice bar. The juice bar is essentially like a limit break from Final Fantasy, but instead of each character having their own individual limit break meter, your whole party shares one. Depending on how much juice you have filled up in the bar, you can do different things. If you use 3 juice, any of the four party members can use a special attack that mixes with one other party member, and for 10 juice (the max) you do a massive all-out attack with everyone contributing with high a high damage move.
Other than the story itself, the main driving point of the game, I'd say the best part is 100% the music. The way some of the tracks are composed, it gives me chills. I love the way how the soundtrack starts off just as innocent as the game, and as odd things start happening in the dream world, the music takes a turn towards the darker side as well. There are small tid-bits of stranger more ominous music that just come up every now and then to worry and unnerve the player, with it being all pleasant and friendly from 'Title' up to 'A Home for Flowers (Tulip)' with it then going into the at points ambient and very unnerving 'Arachnophobia' with it then after that going back to the joyous music again with 'Tussle Among Trees'. The music, and the whole game itself, is very bipolar with all the going back and forth between the light and dark themes of the story, with it getting much more darker later on and staying like that for awhile.
Now that all the other stuff is out of the way, I can actually talk about the story and what makes this the game that comes to mind when calling games an art form. The way the game starts off with all these cute things that seem innocent really doesn't prepare you for what comes later on. Everything seems so inconsequential and silly at the start, but you can start to see things that build up to more later on. Werther that's from things like Mari always at the picnic blanket and never with the rest of the party, everyone being physically and emotionally colourful, there being paths blocked off because of Omori being scared of certain things and all of White Space, with it being an endless looping void.