Looks cool, plays very well, and I am a sucker for pixel art in general so it's right up my alley. It's also quite difficult which I like. I love the stamina mechanics which maken this game stand out from most other metroidvanias (especially in the h-game scene) which just make you spam attack until the enemy is dead. It makes combat require planning despite it being quite simple.
That being said I would suggest two things.
1. Sometimes when you have two different enemies on top of you they will just take turns, softlocking the game and forcing a restart from castle. After being raped where you have to press W to get up add some invincibility frames or a period where you can't get grabbed again to prevent this.
2. Controller support. I played this on my Ally X and used Armor Crate game specific setups and it played amazing but official support would be appreciated.
Over all great little preview. I'm looking towards more great things from this project. I believe it has a lot of potential.