I liked the aesthetic and atmosphere! I think the pixelart looked really nice, although I think the character could use a little more frames of animation for the run. With the right arm going forward, to his side, and forward again it looked more like half a run cycle. The hiding mechanic I thought worked well, although once I died to the enemy because I came out of my hiding spot a little too early even though I thought they were fully past me. I'd say generally it's a good idea to make enemy hitboxes a little smaller than the actual sprite to give the player more of a chance. All in all great job, and it'd be cool to see the story of this fleshed out into a completed project!