I've talked back and forth with rainwarrior and it should be there, and I tried emailing itch.io but they never got back to me after two weeks. Quite frustrating, really. At least the DRM-free version works, and rainwarrior was able to manually get me a key!

I have provided a key directly to keiyakins, but I will contact itch.io support to make sure this is resolved.

itch seems to have fixed it yay