I really like the black-and-white visuals, the animated visual effects of the actions, and the interesting narrative provided at the opening that makes it feel like there are some deep messages like in some anime films. I would love to hear background music and sound effects to go with the actions, which you have probably already thought of.
As a total noob non-gamer, I don't have the average gamer's trained intuition to spot the hot spots in games. I managed to uncover the thing that looked like a castle ruin. But then, I don't know how to interact with it, and nothing new I could uncover.