Interesting game concept. Liked the graphics and isometric view. I think the player movement could be improved by using unity's character controller. That way it will smoothly rotate to look and move in that direction instead of the hard direction changes. I also think if you throw on some post-process effects -- really easy to do in Unity -- like by adding bloom and a vignette, the presentation would look better. Some interaction sound effects would be great too, especially anything telling you that you can't interact with something yet. Seems like there is something you could build upon here to make more of a game demo out of.