Obviously this is a celebration of Halloween but I also think GhostNote was celebrating the fact that she has finished up the last of her huge to-do list of game images for Episode 7. All of the planned art for E7 is now done and in the hands of the writers and programmers.
I don't know how many of our members around the world celebrate Halloween or something like it. Here in the States many people lose their minds for a day or two, dressing up in outlandish costumes, attending dress-up parties and eating unhealthy sweets. Ghostnote decided to put our favorite characters in a completely different setting, perhaps on the way to a costume party. Don't ask how Brad managed a date with all 5 girls at the same time or how Faith might be getting around.
spoiler: show