Here is an overview of the game, via Nintendo.com:
A surreal, hack-and-slash roguelite, players battle a nightmarish depression that lives in a young woman’s subconscious.
Dreamscaper is an action RPG roguelite, blending elements from brawlers, top-down shooters, and dungeon crawlers.
Every slumber is a different random dungeon and you must unlock the power of your dreams to see a new day.
Play as Cassidy, a young woman trapped in a deep depression. Dive into her subconscious to take on the surreal nightmares she wrestles with.
Visit the official website here.