Hm, might be a version compatibility issue. Opens fine for me on v0.2.5g. What version are you running?
I've looked into it and it seems some stuff was loading in the wrong order, so the font didn't display until you ran the .p8 file twice.
I've pushed a new cart version that should fix that. Also confirmed it works on v0.2.6b, at least on Windows. Could you download the new version and check again, please?