I love the style and all the influences you've pulled from! However I think this demo needs some love and refinement.
My biggest gripe is that there are 2 control schemes with multiple variations that you switch between constantly, with very little feedback as to which one you're in, and what the restrictions are. I think a ui animation telling you what mode you're in would be really helpful.
The free look camera in some of the bee-tem up segments is also kinda rough. It's way too pulled in and centered on the character to see what's going on, and the fact that the lock on button doesn't move the camera to the target is frustrating.
I'm really excited for the concept though! I wanna see it work! I've been working on a 3d beat em up myself and I'd be happy to share some of the things I've learned if you're interested.