Does this work?

[algj]

I'm not a C++ programmer, but I'm pretty sure this was not finished and does not work.

If so, it would be nice that README would say it is not finished and won't work.

Or maybe I can't get it to work? I'm getting black window.

[ktnyt]

Hello!

As you've pointed out this indeed does not work.
I've parted ways with BMS a while ago and never had a chance to finish this project.
I'll mark it as such and archive this repo. Thank you for your interest and I'm sorry to have disappointed you.