Awesome! I reached Room 07 during my two last runs.
I love Solomon's Key ( but actually grew up with the ersatz Spherical which I love too) to the point we talked about making such a game for this Jam. You nailed it! The NES asthetics and sound effects are perfect and the music is super nice. I like the skeleton's behaviour and the difficulty is exactly as I want it to be for the JAM.
I love it!