Oooh Luck be a Landlord + Peglin/Peggle + Minecraft?! You are taking inspiration from all the right places. Nice work on this game, it was a ton of fun - I'm saving this for later.
I think the core game loop was quite fun. There was also a surprising amount of content too with the various weapons, consumables, and enemies. I beat the boss in just the first run (saved for relics and the occasional extra pickaxe) so I think some extra difficulty could be nice for more replayability. I would also love a little greater enemy variety (most seemed to basically shoot me for various amounts of damage. And my one concern that I was not clear on is the durability system - I didn't know if my weapons would break after use for the rest of the fight.
I hope you continue building this out - the game loop is familiar enough with a lot of the recent indie roguelikes\lites, but I think the formula here is fresh enough to be special!