Hey guys:
I played and had a good time. The environment is pretty (especially lighting), and I felt the ghost's movement is satisfying. I had a feeling that the environment was spaced out a bit too much, as there isn't much to do while navigating between way points. For example, the red one-eyed monster and blue spike-shelled one kept popping up here and there but to me they didn't deliver anything beyond practicing the combat mechanics.
As an experienced player, I managed to cheese Black Knight by standing on the stairs--withering his HP away to 0 while he didn't even notice my ghostly existence. There was also no onboarding / tutorial, and in addition the 2 GB file size might shy away a lot of beginners who'd like to try your game.
Good stuff for the game jam!