Really great demo! The art, atmosphere, lighting looks amazing and with a lot of really nice small details. I liked the variety of enemies, the mechanics for combat with the orb took a little getting used to but overall I liked the mechanic. It took me a second to figure out the key binding for the orb (but I also might have just missed the hint on what to press). It also took me a few tries to figure out how to target the boss in the beginning of the fight at first, but I got it eventually! The mechanics for walking and melee attacks felt great, the roll does go a little far sometimes, and it would probably be nice to have a block mechanic (but that entirely depends on the type of gameplay you want to implement). The overall flow of the game was great though, I didn't feel stuck at any point and the NPCs gave good hints on what to do next, and exploring the environment felt really intuitive.
Overall a really cool game if you're looking for a nice atmosphere and some cool combat!