Sadly, it looks like I won't get to play Ossuary. I tried changing the compatibility to Windows 8, reduce the resolution of the application, and disable high-DPI scaling effects (among other things), but nothing worked. It's unfortunate because it's clearly a clever game: I like the writing, the world-building, the weirdness, the mystery. And I got interested in the first place because Extra Credits introduced me to The Majesty of Colors.
On the off-chance you ever remaster the game, I'd love to play it.