First off, I'd like to say that this demo is really cool! I love the worldbuilding, mechanics, and art! I've seen a few posts saying the difficulty/combat was too hard or clunky, and I really couldn't disagree more.
Now the few bugs I've noticed:
1. The biggest one and the only one I've been able to replicate several times. In the spider fight, if you stand against the left wall and let the spider hit you while you're eating an apple, and then immediately roll to the right, the spider gets locked in a running animation into the wall. He goes back into normal attack mode after you hit him, but this gives you a free way to heal or get a free hit.
2. When forging, pressing the forge button with a PS4 controller (square) doesn't work, however pressing "X" on my keyboard does. The workaround I have found, which is interesting, is that if I (using PS4 controller) queue up the items to be forged, add an extra item like a mushroom or an apple, and then remove the extra item, the forging process activates. This happens every time, and I didn't think a screen shot would help much here.
3. I was unable to replicate this, but by the forge underneath the watchtower, right past the vendor, I somehow jumped and attacked near the forge, and then Armin's sprite got stuck in a fall animation, but still moved around freely. Going into the cave reset the animation.
Thank you for your hard work, videos, and streams Adam! I intend to follow this game for a long time, and I anticipate the eventual full release! You might see me pop into your streams from time to time under the name Gridor7. Cheers!