Suggestions are always welcome! I didn’t mean to discourage you.
It’s just there were security issues with Flash Player, which is why it had to be abandoned by the biggest browsers out there. I just can’t see Itch.io adding custom support for Flash games.
To be clear, I have no say in the matter, that’s just my opinion. This thread is still active, so admins can have a look at it and make their own decisions :)