I just can't wait to play the full version. Art, music, atmosphere, everything was fantastic. It reminds me of Momodora 4 and Dark Souls (even though I didn't play either :P)
I think that what you did best was the atmosphere. During that sneaking section in the beginning I really felt the pressure.
I felt that the combat didn't really make me switch weapong or tactics a lot, at least not for now. It was kinda hard to switch weapons for me, as it switched 2 at once (I don't know if it's because of my mouse or the game)
I also think that you should put in some dialog and other characters (except if it's not working with the story)
Also, I find that it would be useful to be able to go to the main menu through the pause menu.