First the issues. The combat feels "sticky" and it takes a bit long to go from standing to crouching in order to react to ground enemies. You can get stuck at the tops of staircases and fall into bottomless pits at the bottom of them. I don't know if the standing enemies were meant to be walking in mid air sometimes (maybe they are going to be apparitions?) but I wanted to report that.
All that being said I still had a great time. I appreciated seeing the bats in the far distance and can tell that will lend itself well to building the atmosphere. With enough polish and love this could be a really great game and I hope you continue to work on it!