I think the presentation is great and the sounds are nice. I also like the story and the text chat boxes. Certain jumps were a little strange, especially those with the ceiling above the player. The combat was nice, and I liked the enemy variety. To nitpick, I wasn't really a fan of the serpentine sigil as I ended up having to circle the first area over and over to find the 15th sigil which was in a pot or something. I also think the movement was pretty stiff. I also think it's a little difficult to find yourself in the world as a lot of areas look similar.
Overall though, awesome work :D