I like the audio of this game a lot and it's really pretty, too!
However, unfortunately, for me, the gameplay loop lacks all kind of motivation. The overall combat experience is not engaging. I have no reason to push forward ever, since there are not items to pickup, no goals to reach, nothing to do. On the other hand, just waiting in the corner and luring enemies in is not that fun, either. The weapon feedback is also pretty much zero, it's not interesting or fun to use.
Overall, these are the points I would start with regarding improvements. Hope this feedback helps :-)