itch.io

bfxr was superseded by bfxr2 by the same author: https://github.com/increpare/bfxr2
It's written in JavaScript, so you can just use it with any modern web browser now.

Can I know the name of the voice actor for this game?

I got the first 3 endings, but I'm not sure how to get the hidden one. The description says that there will be a hint, but I don't see one.

EDIT: Lol, I got it!