i second this!!! i preordered the game two years ago and there isn't any download link available for me. i had itch.io send me a invoice of all my available purchases, and while it shows spirit parade it only shows the bigger demo version download link, not hayato's route. any help would be appreciated!
I think they took the download down because the file was corrupt. They said they'll probably need to recompile the game, so they'll reupload a fixed version later.