Yeah, I've noticed these issues with Windows, but didn't bother fixing as this is more a learning project to better understand games like Minecraft. Might test some different compare modes for "love.graphics.setDepthMode" later to see if it fixes it.
Thanks for this link! I've been wanting to try love but it's hard to find a real codebase that's small enough to just read through to learn it but also complex enough to be realistic. This seems like a great example.
I may also recommend the BYTEPATH tutorial [1] as it was my first introduction to LOVE game making.