Don’t have too much feedback; it’s very similar to a couple other games I’ve played on here. Not a bad implementation of it, but not particularly novel, but that’s okay.
The “second” resource in each level was frustratingly close in color to the “first” resource, making it tedious to hunt it down when needing it for crafting. (Coal very similar to stone, especially in the dark, and lignite(?) very similar to claystone) If I could suggest any change, it’d be to make sure those are more distinct and to maybe make max stamina or stamina regeneration stuff available early game. I stopped playing mid-second tier, as it felt like I’d experienced all the game loop had to offer me.
I don’t have a bias against AI and understand the benefit of code assistants, but just to chime in about the other comments, if you used claude or similar to assist in development of your game, that’s considered generative AI, and I’d suggest removing the tag (since people following the “no generative AI” tag are generally wanting absolutely no AI used at any stage of the game’s creation).