It shows up as a Christmas tree for me on my phone in portrait mode. In landscape mode the braille is messed up.

I’m assuming they fixed the formatting since you posted, but it’s a Christmas tree in text art using braille characters.

Side note: I assume you can’t call it ASCII art if it uses non-ASCII characters, but Unicode art doesn’t have the same ring.

If you're viewing on a desktop, shrink the browser until each line stacks below the previous one, creating a tree.

A Christmas tree through the snow?

Fucked up Braille?