I came into this game really enjoying it but ran into numerous problems testing with my partner. I really liked the music and the ambiance it presented, the presentation, and the idea of the game. The first level was great but ran into some problems from there.
At numerous points my friend and I got trapped in the architecture, ended up in different levels, and couldn't use spells. Skipping levels when running into these issues caused worse issues.
Additionally, it would be nice to have controls laid out for the game on your game page or in settings.
I think the networking stuff was the stuff most likely causing issues, but if this was running locally I could see this being a ton of fun!