If you display the code on this cart, you'll see some unknown symbols in the header comment.

Here's a comparison of how they look in PICO-8 vs. how they look on the BBS:

I assume this means the BBS doesn't do the glyph->unicode conversion trick.

Thanks -- fixed. I also updated the code viewer for the new cart format, and reduced the syntax highlighting as all of the extra DOM elements were running heavily on some browsers.