Gonna say here what I said in Eternum, too... You really should consider putting this gem on Steam!
It is a new audience, and a lot of the stuff on Steam in the genre doesn't even rank ankle high compared to this!
For Steam, I can buy Steamcards and don't need a creditcard, I'd buy in a heartbeat... maybe make the patreon stuff a DLC?
And with itch switching up the payments... just saying...