Please look for the "Request key" button on your purchase page.
The problem is that there is not a Request key button at all.
That's strange; there are still some Steam keys available on itch.io... Maybe that's a problem on their side.
Anyway, please follow me on Twitter (so I can DM you) or shoot me an email (my nickname here @thesecretpie.com) and I'll get you a key.
Just sent an email to you, thanks very much :D
