Really interesting game. I beat it though sooo wished there was more. I could see this being a really cool metroidvania with a twist. It could focus on more stealth and horror rather than combat.
It took a little bit to find out that I could move while in hiding, might want to inform the player that they can move while hiding somehow. Like stating hiding is crouching and have a zone where they have to crouch to go under. I do know you have one later.
The art was really cool, especially for the player.
I’d suggest either using Spacebar or the S-key for hiding instead of having the player possibly remove their finger from A or D keys while they are moving.