I think the art direction is really cool. I also really like some of the environment settings. Wasn't able to play through all of it because I have a really hard time playing games on web for whatever reason.
The animation where you back stab the first enemy caught me off guard in a good way, I liked it.
There are a lot of things that should be looked at like sensitivity and feedback on if I am dealing damage to an enemy. Also I'm pretty sure the big shotgun enemy was shooting me through the wall.
Overall, I think you did a good job and looking forward to seeing more!