It would probably be the same error on Steam, but it's not displaying an error message. Not sure what Harfbuzz is or if you could update it.
I can send you a promo code to unlock all the chapters on android if you give me your email.
I think harfbuzz is something to do with the program itself but I don't have a clue. I tried google and everything that pinged was... advanced. I checked the installed version on my distro and its above the version its saying so... no idea.
Oh, is that okay? I didn't expect that at all. Thank you so much. (redacted)
Edit: thank you so much! I got the code. You're amazing. <3