Very nice! I really like the artwork and general style; the enemy designs especially stands out as super well done to me. And the lighting really adds to the game's vibe!
I think that this would really benefit from a bit more direction. Even just something on the game page would be nice. I really had no clue what the things I was collecting were doing, and I couldn't really tell from the inventory screen what I had equipped or what some of the things there even were, despite the nice little descriptions. I know it can sometimes be annoying, but designing some simple little bits to tutorialize might not be a bad idea if you're up for it.
That said, not understanding everything didn't stop me from having fun and enjoying the art and music! Great work!