Hm...with all these arc character and Sumi going to the moon...I suspect that Sumi isn't in actual Gensokyo but instead the Dream World (if so, Smug Santa when?), and is experiencing Groundhog Day Syndrome, in which she encounter the same situation again and again.
Edit: Or else she's reliving the event of the previous game.
Edit 2: Also, instead of" returning to main menu", it's "return to Dream Diary", and instead of next game, it's "next Dream". Aside from the fact that Yume Nikki is a name synominous with a creepy game, this really does feel like she's digging deeper and deeper into Gensokyo's dream.
Edit 3: And with this game being a Shoot a bullet and Double Spoiler, this is definitively ZUN's way of saying how social media have become news in the internet.