For those unacquainted with the series, Touhou can be somewhat of a confusing beast to understand. Ranging from bullet-hells to fighters, RPGs to platformers and now even dungeon-crawlers, it can be a little intimidating to figure out where exactly everything starts and ends in the Touhou Project. For the backstory on this particular title, Touhou Genso Wanderer is a fan-game based of the original (most bullet-hell) titles from Team Shanghai Alice.
As a fan-game, Touhou Genso Wanderer Reloaded strays a little away from the standard genre found within Touhou games and instead is most comparable to the Mystery Dungeon games, as a dungeon-crawling roguelike. The “reloaded” portion of the name is there because this is actually a port of the previous version that had been on PS4. The game remains more or less the same, just now including the DLC and also being playable on Switch.