Absolute gold star submission right here, this game is absolutely brilliant. Wears its inspirations on its sleeve, yet still does something really cool with it. I found the boss design to be really engaging even if the giant sandworm is gonna haunt me for the rest of my days, and everything about the game feel is just A++. I did feel like the roguelite-esque upgrade system felt a little superficial, particularly because when I saw them I immediately got the impression that this was gonna be a one death and you restart type boss rush when that wasn't really the case. I think if you're gonna continue to build this, then do away with the passive powerups and instead have all your powerups be dependent on the weapon you're using IE hammer raising your HP by a lot, or the sword increasing your stamina gain significantly. I just think that'd help streamline the experience and put the entire focus on the weapons and spinning.
Phenomenal job overall though, this is a proper proper indie project in the absolute best of ways and I had a complete blast playing it!