Is Gensokyo Really a Game?

We sing the praises of flowers blooming in all four seasons, marvel at the great battle against ten thousand demons, then light the beacon fires in the heavens and establish the fantastic land beloved by the gods... But after Jiang Feng had done all that, while waiting for a new chapter or DLC, he began to notice a few problems.

Moriya Shrine was next door, and the Scarlet Devil Mansion was on another continent...

So... Gensokyo really is a game, right?