Okie, are you attempting a download through the itch.io app or through the web browser? And if the app, have you been able to download other games?
I'm using the app and yes I have been able to download other games
I wasn't able to find a permanent fix on my end, but I'll keep looking into this in case someone else has problems. Please send an email to hummingbirdstudio (dot) games (at) gmail (dot) com and I'll send the zip file for the Windows build!