I enjoyed this demo! The atmosphere is really nice, the art's not too bad, and the combat is interesting.
The music is nice, but you should maybe pick up some better soundfonts or samples for the future. As it stands, the music is a bit loud, and without much processing, the MIDI-esque instruments are a bit harsh on the ears.
The loss of control during cutscenes was weird, since it felt more like my keys had gotten stuck down rather than I had entered a cutscene. Have you considered adding the "cinematic widescreen" effect for when you're in cutscenes?
I punched one of those mouse-things into the side of the mountain, not sure if intentional. I also really don't understand the point of the smaller creatures, since you can just beat them away effortlessly.
Have you considered putting a limit on how low turn times can go? When near death, our turns became pointless, as he couldn't even land one attack if I stood next to him.
Great game overall!