Pretty good game! But difficulty is high, at least for me, and i didn't completed the game, but i spent some good time with that and i think, you can improve it quite a lot to make it really full game! Would love to see character model, will feel a lot more immersive. But most important thing, maybe you add some hp bar, not numbers, but something, that will still feel like death is coming, but with the hint, when you should you soul, because, it took me a while to understand, that the transparency of capsule is the hp, but i still don't know, when i should actually use souls, i fear that i could die any second. If you want to use that feeling, then you can keep this feature, it's quite great!
But overall, good job! would love to see your other projects in the future.