Alright lemme go ahead and drop every single game breaking bug down right here:
1-Sometimes the game simply crashes during combat
2-Dark rooms take exponentially longer to enter as the game progresses, eventually never loading in at all. I assume its either a memory leak, or the game is using a variable for the room transition wait time and that variable happens to be tied to number of items collected.
3-In the badlands your feet make no sound and the enemies are invisible non-interactable, but still present. You also cannot save in the badlands even though there is a campfire.
4-sometimes the game will say you got something, but in reality you receive nothing this seems to happen a lot with pickaxes.
Now here are some things that aren't bugs but just some bits of bad game design that need fixing.
1-fix pickaxes. You can have maximum durability and then get unlucky and just not be able to mine anything. Make it so that each ore node takes a while to mine but only requires a single hit to break. I'd also recommend making it so that you can pick up the pickaxes just lying on the ground.
2-make it so a crafted ring is stronger than the materials used in crafting it.
For example: the empty ring gives a 10% boost to 4 different stats, and most of its upgrades are only half as strong.
3-for how rare and limited pickaxes are most rings require a massive amount of resources to craft, and are pretty much only obtainable through save-scumming.
4-Lastly, the fast moving enemies towards the start of the game would instantly kill a new player in a flurry of attacks. Might be a good idea to give the player some sort of warning that enemies can do that.