This is great, the atmosphere is on point. The web player worked well in fullscreen for me, a minor issue in getting to the menu because esc comes out of fullscreen but it wasn't an issue.
The crowbar swing and breaking of the planks felt chunky and satisfying, the movement speed and stamina are balanced well to reinforce the atmosphere.
It would be nice to have a skip button for the dialog as it stays on screen a bit too long. I tested the fire at the start to see if it did damage (has to be done right!) which meant I had to sit through the into dialog again, not a big deal.
I found the flashlight a little too bright sometimes and it obscured what I was looking at.
I'd be excited to play again once you've done more.