Hi! Thank you for showing interest in playing the demo! <3
As I've also mentioned on the main page, the demo is currently unavailable for download until the next demo version comes out, as it is outdated, and I was afraid that it was misrepresenting the game when the next version has evolved quite a bit from it. I'm unsure when it will be out again, and whether it will be released per route or all routes in one, but I'll announce it here on itch.io, Twitter and other social media when it's up for download again :D
The new demo version is almost fully written (only missing one scene), and we are in the process of beta-reading, coding, and getting art done for the routes. It shouldn't be too long from now!