Loved the demo. Never player the old kings filed games except IV and this one is faster, but really enjoyable. Are you using Unreal Engine? If so, everything is blueprint code, some C++ or all is C++?
Good level design, smooth presentation of the combat elementes as well. The majority of games like this simply expect you know how to play it and throws a bunch of freaking hard and random enemies right in the beginning, but this demo does differently. Graphics are good and music too.