So overall it's a really good game, beautiful art style and lighting. Sound design and music are good.
So my laptop didn't have much of an issue running this game, I didn't see any noticeable frame drops or stuttering, but it definitely got hot which I can tell by my fans as well as just feeling my laptop (i5-12450h, 3050 mobile and 16gb ram).
I got relatively far, I got up to the diamond pickaxe (not handle but I can't think what the top part is called). As far as I can tell all the ores do spawn you just need to go deeper for better ores, which is normal for a mining game. So people that couldn't get past the iron and coal crafting just didn't dig deep enough.
The only issue I could see was that when mining you could sometimes see through the walls, my guess is that it's because the back of the ground isn't rendered and sometimes when you mine it takes a second to render the newly generated ground. For a game jam game that's not an issue, but if you guys decide to take this game further you'd want to look into that.
Honestly as an unreal game this is extremely impressive. The mechanics are extremely unique and I didn't really think something like this would be possible in unreal engine, but you guys proved me wrong. You often hear about this super realistic games that often seem to be extremely similar in the way they approach visuals and mechanics. This game has such a unique art style and plays so differently from a typical unreal game which I really enjoy.
Sorry for the long comment btw