Would appreciate a specific type of feedback

I am thinking of expanding my entry into a fuller version and was wondering what Mechanics, Enemies/bosses, Settings, Areas, etc would be interesting to see, I am creating a list of things to pull from later so any suggestions would be interesting to hear.

The Game: https://ldjam.com/events/ludum-dare/48/the-falling-knight-v-s-the-endless-pit-of-dark-despair