You can get weapons by helping the blacksmith (the bottom right corner of the village, with the metal-y ground.)
I'm not quite sure what you mean about the jank. Do you mean that if you hold down a key to move in a direction, then it moves quite quickly and in big discrete steps? That's a consequence of how the movement works by being fully tile-aligned, so it "teleports" to the next tile rather than smoothly going pixel by pixel. So within that environment, I think the only thing that would help is just moving slower.
Having finer-grained smooth movement rather than just skipping between grid tiles would definitely be nicer. But yeah, new game and movement code in 48 hours - we didn't even have enough time to render the text nicely on screen =)
We'll do a v1.1 after the jam with some improvements, though unfortunately supporting smooth pixel-movement instead of tile-movement is probably too big and out of scope for this game.