is it possible to get access to any of the patron stuff after buying on here?
Sadly, no.
It would be pretty cool if Itch and Patreon had a integration like that, but it doesn't.
If you want to support the further development of the game then I suggest joining our patreon, plus you get the bonus posts that come with the membership.
If you just want the latest version or just want to see what the game is about then I suggest buying it on Itch.
That's how I see it at least.