If you want to go back and find it just for completionists sake (or to up your score ^_^), your progress should be saved in your browser =). Assuming it's what I think it is, the quick hint is that there's 2 secret doors in the cave.
Oh, noted. I might go back and try to find that then. :)
Edit: Yep, that was it. And that bumped me up to #9 on the HoF. Not even gonna try to get higher than this, cause honestly, it'd be a fool's errand. That and I'm satisfied with #9. Lol.
(Tried to put the HoF screenshot, but Itch said no...)