I'll also note that a fairytale themed jam, "Once Upon a Time VN Jam" (also run by chimeriquement), is running soon! If you replace the background, then you're more than welcome to submit for that jam, as the game is quite fairytale-themed!
Absolutely, although I'd like to add the following precision: since the game was released before October 1st, you would need to have a significant writing update (at least one new scene) to submit it to OUAT.
