Cool game! Super impressed with the amount of effort put into this. Can't imagine setting up a crafting system with resource management to be an easy task. I think my only real critique would just be on pacing and the goal of the game.
The start seems really slow. With all the enemies that came at me at the beginning, I instantly wanted to make a sword but couldn't figure out an easy one to make (didn't even end up making one during my playthrough with how long it seemed to take to make the slime sword - also not sure if their was a better item to make for this scenario to be honest). Also, the cost of swings it takes to kill or destroy blocks seems pretty high for a jam game. I eventually smelted and forged the better pickaxe and honestly couldn't really tell the difference between the crude and the better guy. I think maybe reducing how long it takes to kill enemies and destroy blocks might speed up the game a bit so people can get into the build phase quicker.
Additionally, I didn't really understand what I was trying to do. Like, I get progressing a crafting system is the goal but my question would be why? I know Minecraft follows the same progression but they have an end goal with an Ender Dragon as a boss that you prepare yourself towards through the crafting system built into that game. Not saying you have to do that for a jam, since that is definitely not in scope, but maybe the player is exploring this crafting system to build something needed to escape this mine or enemy-filled cave they are in. Just food for thought.
Regardless, cool stuff and if you continue to work on the game, keep it up~!