You're fine, don't worry!
Unfortunately, I only accept whatever payment methods are available on this Itch page. I cannot accept additional or external payments, as it would be very tedious for me to keep track of and handle by myself.
As mentioned in the FAQ, I'd also like to have more content available before I publish to Steam, as there is a $100 USD fee which I don't think is worth it, given the current state of the demo. If there's a high enough demand, I might reconsider, but as things are right now, I genuinely don't think I have the time or necessary commitment to dedicate to another storefront other than Itch ^^;
Thank you for your support and understanding!!