How do I actually attack? I can't figure out how to swing my sword such that it does damage. Also accidentally found a bunch of things that should have been more obvious, such as needing to press K to see the upgrades screen. This game really needs a controls overview.
edit: I'm guessing I may need to buy a sword first, but I thought I had one already because of the character sprite. So I guess my next question is how can I get gold to buy a sword (or some other weapon etc) without killing wolves