The Switch version will be playable at the Play, Doujin! booth at The 19th Annual Hakurei Shrine Grand Festival on May 8.
— Play,Doujin!プロジェクト (@PlayDoujin) April 29, 2022
Here is an overview of the game, via its store pages:
Journey through a pixelated, isometric version of Gensoukyou in this quasi-3D action RPG! Play as Reimu Hakurei and friends and take a shot at getting to the bottom of the incident!
This time, Gensoukyou features a rich variety of terrain! Explore every nook and cranny of this quasi-3D playing field!
Using the dash and jump buttons, as well as attacks and special equipment, players can access a great many places! There may even be secret locations unrelated to the story waiting to be found!
Battles are done using quick action commands! By hitting the right buttons at the right time to match the life-like movements of Gensoukyou’s residents, you can accumulate power and or take down your enemies one after another!
You can control eight different characters: Reimu Hakurei, Koishi Komeiji, Tenshi Hinanai, Sakuya Izayoi, Yukari Yakumo, Reisen Udongein Inaba, Nitori Kawashiro, and Doremy Sweet! Each of them wields a different weapon and fights in a different style!
This story features many different characters from Gensoukyou! They may present themselves as allies or enemies as you work to uncover the truth behind the incident!
By following the numerous diverging routes, you may discover surprising sides of the Touhou characters, and perhaps even receive things that may aid in your journey! Some characters may even challenge you to a duel! Can you win against them all?