The BGM is a bit too quiet, making it hard to hear. I also strongly suggest adding simple sword and monster sound effects, as the silence can feel noticeable at times. I believe that's an issue that can be fixed fairly easily.
Overall, I think the game is successful. I enjoyed the demo, and I believe it will be even better by the time of the full release. I uploaded a gameplay video and hope it helps the game reach more people. Good luck with the development!