You screwed up and bound smithing to the same key as striking. So even when you're at that strange structure at the start and center of the map which I assume is some kid of forge, J does nothing but striking.
This is absolutely a zero and I can't believe you'd submit this game with such a ridiculous bug.
J does both striking and Smithing. You have to hit stuff together to make new weapons. At the beginning you have to hit the rocks together to sharpen them, and then pick up the sharpened rock.
I think what the issue here is that I changed the game so that the new round doesn't start until you pick up the next weapon, so if you don't know to pick up a sharpened rock, nothing ever happens. I suppose I need to have a better way to introduce the player to the mechanics of the game.
To those who found this review helpful. The game does in fact work, and this is not a bug. It just doesn't have any tutorial elements, and you have to figure out what to do.