Wow, you actually killed it. This feels like a complete and finished title, with a bit more content, it could be put on steam.
As for balance: Going primarily for bows seems to be a pretty dominating meta. I made it through all three areas and looped back to the forest pretty easily. Very much enjoyed my time doing so, though, so it's fine.
And as for weapon ideas... you could add guns C:
All that aside, I blew an entire hour on this and that was only one playthrough, thinking about replaying and giving knives or something a go. You did amazingly in the two weeks given.
Well done!