for example, me I can only buy in USD online (personally I am working to resolve this) but will there be a way to get this in USD like on gamejolt?

Yes, itch.io allows any currency to buy games.

it's just my debit gift card only allows purchases in the US and I bought other things with so it does work, but an error message occurs when I try to buy it, mainly because the purchase is in AUD maybe the error message was due to other things so I'll try again now.

it still did not work

paypal worked, i used mastercard and that didn't work.

ah sounds good