I can't paypal either :(
i wish itch.io had different payment methods :[ sorry guys maybe ill get it on steam someday
most games propose something else (I think it's stripe?); some propose a choice between paypal and Stripe. I have no idea what the logistics are and if it works for you, but maybe you want to look into it? I'd love to be able to buy this here, not on Steam, if possible (I generally avoid Steam).