Really good job!
The art is very good, but could use a little more contrast. It's hard to tell where is the ground sometimes.
The atmosphere is great, fits right into the dark story. The movement and combat is a little awkward, thou; the parry won't work (maybe it's lag from playing in the browser?), so I had to rush everything with a hit and run style.
Definitely looks like it would be better playing as standalone instead of the web.