I started playing last night (downloaded through Itch.io) and picked it up again to play today. I was at the point of going to hang out with Akira again, and suddenly I started getting a bunch of visual and text glitches - they were so bad that at first I thought they must be part of the story.
I noticed there was an update, so I just updated and restarted, and the same thing is happening from the beginning now - text is turning into unsupported characters and the visuals (mostly in the text boxes and choices) are getting black and rainbow boxes around them.