This game is blowing up the internet. I played it a month ago, knowing very little going in, and have spent every day since then thinking about it. It is that good.
Taken as a bulleted list, the fiction and the gameplay are in the dead center of my wheelhouse - but it's the execution which makes it superb. It's a tight, compact little game with a lot to say about its characters and its world.
If you like games like: Chrono Trigger and assorted SNES RPGs, vertical shooters, Mario & Luigi Superstar Saga
If you like fiction like: Madoka, Steven Universe, His Dark Materials
You will probably like this game. It's $10 and it takes about 6 hours to complete.
Bonus: the soundtrack is off the hook