This was really cool! I'm always itching for lo-fi dark souls. I liked the design and movement constraints. Fighting in cramped spaces is difficult! Only negative I would say is the game feels much more frustrating when not using fast mode. I almost gave up on the first level until I found that option.
To add to this, I think some form of checkpointing, like at health restores, would make it less frustrating. I dig the methodical combat, but when facing multiple enemies, there's a risk of getting stunlocked that just feels unfair.
I'm mainly thinking of the encounter in the underground tunnel in the first world. I'm pretty sure one of the enemies has a faster attack rate, or at least it feels like it, so if the slower enemy knocks you down, the other just keeps you from ever recovering.