"so I think I have beaten every boss, including the deep sea thing far to the east.
Is this game over then?" this build has 4 bosses(Still wip). One in the Forest, One in the Mines, one in the Desert, and one in the Ocean. If you've beaten those, then yes.
""key item" section" Game is still WiP, the Key Item Section is only a placeholder(explained in the game description). No worries, by the time the game is finished, it'll be fully functional.
"only found like 2 outfits from what I can see." There are currently 3 outfits, the third(fully optional) one is in that body of water to the west at the start of the game. It's supposed to be a "secret" item of sorts.
Thank you again for all the input, I'll strongly consider all of what you've said when I work on the next version. Explanations are something I've struggled with for a while, because I'm trying very hard to not "hold the player's hand" as they say. I tend to lean too much into the "figure it out yourself" direction and I should really find a better balance.