The bugs I've come across so far have been minimal in amount but very impacting on gameplay.
1. Items I have smithed, cooled, and assembled will reheat and break apart while sitting on the shelves.
2. Lighting errors upon restart
And the least bothersome
3. Occasionally when placing heated ingot on the anvil, 2 ingots will take the same place leaving you to believe you've lost one. Easily fixed in game by either continuing your smithing as normal or by right clicking one of the visible ingots and the third will seemingly pop out and fall to the ground.
Overall great concept for a cool game and being it is alpha i think you've done an amazing job on this build. Best of luck!
Alpa 0.0.7